Fix ESP32 name conflict

Marlin/src/core/boards.h

 //
 // Espressif ESP32 WiFi
 //
-#define BOARD_ESP32                   6000
+#define BOARD_ESPRESSIF_ESP32         6000
 
 //
 // Simulations

Marlin/src/inc/SanityCheck.h

 #define BOARD_BIQU_SKR_V1_1 -1004
 #define BOARD_STM32F1R      -1005
 #define BOARD_STM32F103R    -1006
+#define BOARD_ESP32         -1007
 #if MB(MKS_13)
   #error "BOARD_MKS_13 has been renamed BOARD_MKS_GEN_13. Please update your configuration."
 #elif MB(TRIGORILLA)
   #error "BOARD_STM32F1R has been renamed BOARD_STM32F103RE. Please update your configuration."
 #elif MB(STM32F103R)
   #error "BOARD_STM32F103R has been renamed BOARD_STM32F103RE. Please update your configuration."
+#elif MOTHERBOARD == BOARD_ESP32
+  #error "BOARD_ESP32 has been renamed BOARD_ESPRESSIF_ESP32. Please update your configuration."
 #endif
 #undef BOARD_MKS_13
 #undef BOARD_TRIGORILLA
 #undef BOARD_BIQU_SKR_V1_1
 #undef BOARD_STM32F1R
 #undef BOARD_STM32F103R
+#undef BOARD_ESP32
 
 /**
  * Marlin release, version and default string

Marlin/src/pins/pins.h

  */
 #pragma once
 
+#include "../core/boards.h"
+
 /**
  * Include pins definitions
  *
 // Espressif ESP32
 //
 
-#elif MB(ESP32)
+#elif MB(ESPRESSIF_ESP32)
+
   #include "esp32/pins_ESP32.h"                 // ESP32                                  env:esp32
 
 //

buildroot/share/tests/esp32-tests

 #!/usr/bin/env bash
 #
-# Build tests for esp32
+# Build tests for ESP32
 #
 
 # exit on first failure
 # Build with the default configurations
 #
 restore_configs
-opt_set MOTHERBOARD BOARD_ESP32
+opt_set MOTHERBOARD BOARD_ESPRESSIF_ESP32
 opt_enable WIFISUPPORT GCODE_MACROS BAUD_RATE_GCODE
 opt_set "WIFI_SSID \"ssid\""
 opt_set "WIFI_PWD \"password\""