Save over 100 bytes SRAM in pin_is_protected

Marlin/Marlin_main.cpp

   #define host_keepalive() NOOP
 #endif
 
-static inline float pgm_read_any(const float *p) { return pgm_read_float_near(p); }
-static inline signed char pgm_read_any(const signed char *p) { return pgm_read_byte_near(p); }
+FORCE_INLINE float pgm_read_any(const float *p) { return pgm_read_float_near(p); }
+FORCE_INLINE signed char pgm_read_any(const signed char *p) { return pgm_read_byte_near(p); }
 
 #define XYZ_CONSTS_FROM_CONFIG(type, array, CONFIG) \
   static const PROGMEM type array##_P[XYZ] = { X_##CONFIG, Y_##CONFIG, Z_##CONFIG }; \
 /**
  * Sensitive pin test for M42, M226
  */
-static bool pin_is_protected(uint8_t pin) {
-  static const int sensitive_pins[] = SENSITIVE_PINS;
+static bool pin_is_protected(const int8_t pin) {
+  static const int8_t sensitive_pins[] PROGMEM = SENSITIVE_PINS;
   for (uint8_t i = 0; i < COUNT(sensitive_pins); i++)
-    if (sensitive_pins[i] == pin) return true;
+    if (pin == (int8_t)pgm_read_byte(&sensitive_pins[i])) return true;
   return false;
 }