fix(rgbled): use RGB LED naming

Author: SuGlider

variants/sparkfun_esp32_iot_redboard/pins_arduino.h

@@ -8,8 +8,8 @@ static const uint8_t LED_BUILTIN = 18;
 #define BUILTIN_LED LED_BUILTIN  // backward compatibility
 #define LED_BUILTIN LED_BUILTIN  // allow testing #ifdef LED_BUILTIN
 
-#define NEO_PIXEL 2  //WS2812 LED
-static const uint8_t RGB_BUILTIN = (SOC_GPIO_PIN_COUNT + NEO_PIXEL);
+#define RGB_LED_PIN 2  //WS2812 LED
+static const uint8_t RGB_BUILTIN = (SOC_GPIO_PIN_COUNT + RGB_LED_PIN);
 #define RGB_BUILTIN    RGB_BUILTIN  // necessary to make digitalWrite/digitalMode find it
 #define RGB_BRIGHTNESS 64