refactor: promicro with CustomSX1262::std_init()

added check in CustomSX1262.h to support both txco and non-txco radios
switched promicro to use CustomSX1262::std_init()

src/helpers/CustomSX1262.h

@@ -30,6 +30,12 @@ class CustomSX1262 : public SX1262 {
     #endif
   #endif
       int status = begin(LORA_FREQ, LORA_BW, LORA_SF, cr, RADIOLIB_SX126X_SYNC_WORD_PRIVATE, LORA_TX_POWER, 8, tcxo);
+      // if radio init fails with -707/-706, try again with tcxo voltage set to 0.0f
+      if (status == RADIOLIB_ERR_SPI_CMD_FAILED || status == RADIOLIB_ERR_SPI_CMD_INVALID) {
+        #define SX126X_DIO3_TCXO_VOLTAGE (0.0f);
+        tcxo = SX126X_DIO3_TCXO_VOLTAGE;
+        status = begin(LORA_FREQ, LORA_BW, LORA_SF, cr, RADIOLIB_SX126X_SYNC_WORD_PRIVATE, LORA_TX_POWER, 8, tcxo);
+      }
       if (status != RADIOLIB_ERR_NONE) {
         Serial.print("ERROR: radio init failed: ");
         Serial.println(status);