Add support for building for 16MB "TwilightLord" ESP32

- board definition
- minimal changes to esp32mdevums (un-comment to use)

platformio.ini

@@ -470,7 +470,8 @@ board_build.f_flash = 80000000L
 board_build.flash_mode = dio
 
 [env:esp32mdevums]
-board = esp32dev
+board = esp32dev       ;; standard ESP32 with 4MB Flash
+;board = esp32_twilord ;; "TwilightLord" ESP32 with 16MB Flash
 platform = ${esp32.platform}
 upload_speed = 460800 ; or 921600
 platform_packages = ${esp32.platform_packages}
@@ -481,6 +482,7 @@ build_flags = ${common.build_flags_esp32}
   ;-D WLED_DISABLE_BROWNOUT_DET ; enable if you get "brownout detected" errors at startup 
   -D ABL_MILLIAMPS_DEFAULT=1500 ; 850 not enough for 1024 leds
   -D WLED_MAX_USERMODS=8 ; default only 4-6
+  -D ARDUINO_USB_CDC_ON_BOOT=0 ; needed for arduino-esp32 >=2.0.4
   -D WLED_USE_MY_CONFIG ; include custom my_config.h
   -D USERMOD_AUDIOREACTIVE
   -D UM_AUDIOREACTIVE_USE_NEW_FFT ; use latest (upstream) FFTLib, instead of older library midified by blazoncek. Slightly faster, more accurate, needs 2KB RAM extra   
@@ -500,7 +502,7 @@ lib_deps = ${esp32.lib_deps}
   https://github.com/kosme/arduinoFFT#develop @ 1.9.2 ; used for USERMOD_AUDIOREACTIVE
 ; monitor_filters = esp32_exception_decoder ; used to show crash details
 board_build.partitions = ${esp32.default_partitions}
-; board_build.partitions = tools/WLED_ESP32_16MB.csv
+; board_build.partitions = tools/WLED_ESP32_16MB.csv ; for esp32_twilord with 16MB flash
 ; board_build.partitions = tools/WLED_ESP32-wrover_4MB.csv
 board_build.f_flash = 80000000L ; use full 80MHz speed for flash (default = 40Mhz) 
 board_build.flash_mode = dio ; (dio = dual i/o; more compatible than qio = quad i/o)