First stab at ESP32-C6 support for TLora-C6

variants/tlora_c6/platformio.ini

@@ -0,0 +1,5 @@
+[env:tlora-c6]
+extends = esp32c6_base
+board = esp32-c6-devkitm-1
+build_flags = 
+  ${esp32c6_base.build_flags} -D PRIVATE_HW -D TLORA_C6 -I variants/tlora_c6

variants/tlora_c6/variant.h

@@ -0,0 +1,16 @@
+#define I2C_SDA 4 // I2C pins for this board
+#define I2C_SCL 15
+
+#define RESET_OLED 16 // If defined, this pin will be used to reset the display controller
+
+#define VEXT_ENABLE 21 // active low, powers the oled display and the lora antenna boost
+#define LED_PIN 2      // If defined we will blink this LED
+#define BUTTON_PIN 0   // If defined, this will be used for user button presses
+#define BUTTON_NEED_PULLUP
+#define EXT_NOTIFY_OUT 13 // Default pin to use for Ext Notify Module.
+
+#define USE_RF95
+#define LORA_DIO0 26 // a No connect on the SX1262 module
+#define LORA_RESET 14
+#define LORA_DIO1 33 // Must be manually wired: https://www.thethingsnetwork.org/forum/t/big-esp32-sx127x-topic-part-3/18436
+#define LORA_DIO2 32 // Not really used