Fix RGB / Neopixel white color bug

See #16752

Marlin/src/feature/caselight.cpp

@@ -58,7 +58,7 @@ void update_case_light() {
   if (case_light_arg_flag && case_light_on)
     case_light_brightness = case_light_brightness_sav;  // restore last brightens if this is an S1 argument
 
-  #if ENABLED(CASE_LIGHT_USE_NEOPIXEL) || NONE(CASE_LIGHT_USE_NEOPIXEL, CASE_LIGHT_NO_BRIGHTNESS)
+  #if ENABLED(CASE_LIGHT_USE_NEOPIXEL) || DISABLED(CASE_LIGHT_NO_BRIGHTNESS)
     const uint8_t i = case_light_on ? case_light_brightness : 0, n10ct = INVERT_CASE_LIGHT ? 255 - i : i;
   #endif
 

Marlin/src/feature/leds/leds.h

@@ -33,6 +33,7 @@
   #include "neopixel.h"
 #endif
 
+// A white component can be passed
 #define HAS_WHITE_LED EITHER(RGBW_LED, NEOPIXEL_LED)
 
 /**
@@ -137,7 +138,7 @@ typedef struct LEDColor {
 #define LEDColorBlue()            LEDColor(  0,   0, 255)
 #define LEDColorIndigo()          LEDColor(  0, 255, 255)
 #define LEDColorViolet()          LEDColor(255,   0, 255)
-#if HAS_WHITE_LED
+#if HAS_WHITE_LED && DISABLED(RGB_LED)
   #define LEDColorWhite()         LEDColor(  0,   0,   0, 255)
 #else
   #define LEDColorWhite()         LEDColor(255, 255, 255)

Marlin/src/feature/leds/printer_event_leds.h

@@ -56,7 +56,7 @@ public:
   #endif
 
   #if HAS_TEMP_HOTEND || HAS_HEATED_BED
-    static inline void onHeatingDone() { leds.set_color(LEDColorWhite()); }
+    static inline void onHeatingDone() { leds.set_white(); }
     static inline void onPidTuningDone(LEDColor c) { leds.set_color(c); }
   #endif
 

buildroot/share/tests/megaatmega2560-tests

@@ -31,7 +31,8 @@ opt_set GRID_MAX_POINTS_X 16
 opt_set FANMUX0_PIN 53
 opt_disable USE_WATCHDOG
 opt_enable REPRAP_DISCOUNT_SMART_CONTROLLER LCD_PROGRESS_BAR LCD_PROGRESS_BAR_TEST \
-           PIDTEMPBED FIX_MOUNTED_PROBE Z_SAFE_HOMING CODEPENDENT_XY_HOMING \
+           FIX_MOUNTED_PROBE Z_SAFE_HOMING CODEPENDENT_XY_HOMING PIDTEMPBED \
+           PROBING_HEATERS_OFF PROBING_FANS_OFF PROBING_STEPPERS_OFF WAIT_FOR_BED_HEATER \
            EEPROM_SETTINGS SDSUPPORT SD_REPRINT_LAST_SELECTED_FILE BINARY_FILE_TRANSFER \
            BLINKM PCA9632 RGB_LED RGB_LED_R_PIN RGB_LED_G_PIN RGB_LED_B_PIN LED_CONTROL_MENU \
            NEOPIXEL_LED CASE_LIGHT_ENABLE CASE_LIGHT_USE_NEOPIXEL CASE_LIGHT_MENU \