Add support for the Challenger rp2040 lora (#7826)

* Firmware Built... awaiting parts for test

* Add board_level key/value as per suggestion from vidplace7

* Trunk formatting applied

variants/rp2040/challenger_2040_lora/variant.h

@@ -0,0 +1,39 @@
+// Define SS for compatibility with libraries expecting a default SPI chip select pin
+
+#define ARDUINO_ARCH_AVR
+
+#define EXT_NOTIFY_OUT 0xFFFFFFFF
+#define BUTTON_PIN 0xFFFFFFFF
+
+#define LED_PIN PIN_LED
+
+#define USE_RF95 // RFM95/SX127x
+
+#undef LORA_SCK
+#undef LORA_MISO
+#undef LORA_MOSI
+#undef LORA_CS
+
+// https://gitlab.com/invectorlabs/hw/challenger_rp2040_lora
+#define LORA_SCK 10  // Clock
+#define LORA_CS 9    // Chip Select
+#define LORA_MOSI 11 // Serial Data Out
+#define LORA_MISO 12 // Serial Data In
+
+#define LORA_RESET 13 // Reset
+
+#define LORA_DIO0 14         // DIO0
+#define LORA_DIO1 15         // DIO1
+#define LORA_DIO2 18         // DIO2
+#define LORA_DIO3 0xFFFFFFFF // Not connected
+#define LORA_DIO4 0xFFFFFFFF // Not connected
+#define LORA_DIO5 0xFFFFFFFF // Not connected
+
+#ifdef USE_SX1262
+#define SX126X_CS LORA_CS
+#define SX126X_DIO1 LORA_DIO1
+#define SX126X_BUSY LORA_DIO2
+#define SX126X_RESET LORA_RESET
+#define SX126X_DIO2_AS_RF_SWITCH
+// #define SX126X_DIO3_TCXO_VOLTAGE 1.8
+#endif