Plain RAK4631 should not compile EInk and TFT display code (#8811)

* Plain RAK4631 should not compile EInk and TFT display code

* Add USE_TFTDISPLAY to variant files.

* Derp

* Undo the platformio.ini changes to heltec_v4

* Drop unneeded src_filter lines

---------

Co-authored-by: Jonathan Bennett <jbennett@incomsystems.biz>
Co-authored-by: Jason P <applewiz@mac.com>

variants/esp32/chatter2/variant.h

@@ -67,6 +67,7 @@
 #define SCREEN_TRANSITION_FRAMERATE 5 // fps
 #define DISPLAY_FORCE_SMALL_FONTS
 #define TFT_BACKLIGHT_ON LOW
+#define USE_TFTDISPLAY 1
 
 // Battery
 

variants/esp32/m5stack_core/platformio.ini

@@ -7,7 +7,6 @@ build_src_filter =
 build_flags = 
   ${esp32_base.build_flags}
   -I variants/esp32/m5stack_core
-  -DILI9341_DRIVER
   -DM5STACK
   -DUSER_SETUP_LOADED
   -DTFT_SDA_READ

variants/esp32/m5stack_core/variant.h

@@ -34,11 +34,13 @@
 #define GPS_RX_PIN 16
 #define GPS_TX_PIN 17
 
+#define ILI9341_DRIVER
 #define TFT_HEIGHT 240
 #define TFT_WIDTH 320
 #define TFT_OFFSET_X 0
 #define TFT_OFFSET_Y 0
 #define TFT_BUSY -1
+#define USE_TFTDISPLAY 1
 
 // LCD screens are slow, so slowdown the wipe so it looks better
 #define SCREEN_TRANSITION_FRAMERATE 1 // fps

variants/esp32/wiphone/variant.h

@@ -34,6 +34,7 @@
 #define ST7789_SCK 18
 #define ST7789_CS 5
 #define ST7789_RS 26
+#define USE_TFTDISPLAY 1
 // I don't have a 'wiphone' but this I think should not be defined this way (don't set TFT_BL if we don't have a hw way to control
 // it)
 // #define ST7789_BL -1 // EXTENDER_PIN(9)