Move crc16 function to libs

Marlin/src/HAL/shared/persistent_store_api.h

 #include <stddef.h>
 #include <stdint.h>
 
+#include "../../libs/crc16.h"
+
 class PersistentStore {
 public:
   static bool access_start();

Marlin/src/core/utility.cpp

   thermalManager.manage_heater(); // This keeps us safe if too many small safe_delay() calls are made
 }
 
-#if EITHER(EEPROM_SETTINGS, SD_FIRMWARE_UPDATE)
-
-  void crc16(uint16_t *crc, const void * const data, uint16_t cnt) {
-    uint8_t *ptr = (uint8_t *)data;
-    while (cnt--) {
-      *crc = (uint16_t)(*crc ^ (uint16_t)(((uint16_t)*ptr++) << 8));
-      for (uint8_t i = 0; i < 8; i++)
-        *crc = (uint16_t)((*crc & 0x8000) ? ((uint16_t)(*crc << 1) ^ 0x1021) : (*crc << 1));
-    }
-  }
-
-#endif // EEPROM_SETTINGS || SD_FIRMWARE_UPDATE
-
 #if ENABLED(DEBUG_LEVELING_FEATURE)
 
   #include "../module/probe.h"

Marlin/src/core/utility.h

   #endif
 }
 
-#if EITHER(EEPROM_SETTINGS, SD_FIRMWARE_UPDATE)
-  void crc16(uint16_t *crc, const void * const data, uint16_t cnt);
-#endif
-
-#if EITHER(AUTO_BED_LEVELING_UBL, G26_MESH_VALIDATION)
-  /**
-   * These support functions allow the use of large bit arrays of flags that take very
-   * little RAM. Currently they are limited to being 16x16 in size. Changing the declaration
-   * to unsigned long will allow us to go to 32x32 if higher resolution Mesh's are needed
-   * in the future.
-   */
-  FORCE_INLINE void bitmap_clear(uint16_t bits[16], const uint8_t x, const uint8_t y)  { CBI(bits[y], x); }
-  FORCE_INLINE void bitmap_set(uint16_t bits[16], const uint8_t x, const uint8_t y)    { SBI(bits[y], x); }
-  FORCE_INLINE bool is_bitmap_set(uint16_t bits[16], const uint8_t x, const uint8_t y) { return TEST(bits[y], x); }
-#endif
+// 16x16 bit arrays
+FORCE_INLINE void bitmap_clear(uint16_t bits[16], const uint8_t x, const uint8_t y)  { CBI(bits[y], x); }
+FORCE_INLINE void bitmap_set(uint16_t bits[16], const uint8_t x, const uint8_t y)    { SBI(bits[y], x); }
+FORCE_INLINE bool is_bitmap_set(uint16_t bits[16], const uint8_t x, const uint8_t y) { return TEST(bits[y], x); }
 
 #if ENABLED(DEBUG_LEVELING_FEATURE)
   void log_machine_info();
 // Converts from an uint8_t in the range of 0-255 to an uint8_t
 // in the range 0-100 while avoiding rounding artifacts
 constexpr uint8_t ui8_to_percent(const uint8_t i) { return (int(i) * 100 + 127) / 255; }
-constexpr uint8_t all_on = 0xFF, all_off = 0x00;

Marlin/src/feature/backlash.h

 #include "../inc/MarlinConfigPre.h"
 #include "../module/planner.h"
 
+constexpr uint8_t all_on = 0xFF, all_off = 0x00;
+
 class Backlash {
 public:
   #ifdef BACKLASH_DISTANCE_MM

Marlin/src/gcode/feature/digipot/M907-M910.cpp

    */
   void GcodeSuite::M908() {
     #if HAS_DIGIPOTSS
-      stepper.digitalPotWrite(
-        parser.intval('P'),
-        parser.intval('S')
-      );
+      stepper.digitalPotWrite(parser.intval('P'), parser.intval('S'));
     #endif
     #if ENABLED(DAC_STEPPER_CURRENT)
-      dac_current_raw(
-        parser.byteval('P', -1),
-        parser.ushortval('S', 0)
-      );
+      dac_current_raw(parser.byteval('P', -1), parser.ushortval('S', 0));
     #endif
   }
 

Marlin/src/libs/crc16.cpp

+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (C) 2019 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ *
+ * Based on Sprinter and grbl.
+ * Copyright (C) 2011 Camiel Gubbels / Erik van der Zalm
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include "crc16.h"
+
+void crc16(uint16_t *crc, const void * const data, uint16_t cnt) {
+  uint8_t *ptr = (uint8_t *)data;
+  while (cnt--) {
+    *crc = (uint16_t)(*crc ^ (uint16_t)(((uint16_t)*ptr++) << 8));
+    for (uint8_t i = 0; i < 8; i++)
+      *crc = (uint16_t)((*crc & 0x8000) ? ((uint16_t)(*crc << 1) ^ 0x1021) : (*crc << 1));
+  }
+}

Marlin/src/libs/crc16.h

+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (C) 2019 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ *
+ * Based on Sprinter and grbl.
+ * Copyright (C) 2011 Camiel Gubbels / Erik van der Zalm
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+#pragma once
+
+#include <stdint.h>
+
+void crc16(uint16_t *crc, const void * const data, uint16_t cnt);

Marlin/src/sd/usb_flashdrive/lib/Usb.cpp

 }
 
 uint8_t USB::getUsbTaskState(void) {
-  return ( usb_task_state);
+  return usb_task_state;
 }
 
 void USB::setUsbTaskState(uint8_t state) {