Refactor radiolib for Heltec Wireless Tracker

Made changes and tested transmission and reception.

Note:
TX to T1000E would not work direct, but always went through a repeater.

TX to two Thinknode M1's went through direct..

variants/heltec_tracker/target.cpp

@@ -23,43 +23,16 @@ HWTSensorManager sensors = HWTSensorManager(nmea);
   DISPLAY_CLASS display(&board.periph_power);   // peripheral power pin is shared
 #endif
 
-#ifndef LORA_CR
-  #define LORA_CR      5
-#endif
-
 bool radio_init() {
   fallback_clock.begin();
   rtc_clock.begin(Wire);
   
-#ifdef SX126X_DIO3_TCXO_VOLTAGE
-  float tcxo = SX126X_DIO3_TCXO_VOLTAGE;
-#else
-  float tcxo = 1.6f;
-#endif
-
 #if defined(P_LORA_SCLK)
-  spi.begin(P_LORA_SCLK, P_LORA_MISO, P_LORA_MOSI);
+  return radio.std_init(&spi);
-#endif
+#else
-  int status = radio.begin(LORA_FREQ, LORA_BW, LORA_SF, LORA_CR, RADIOLIB_SX126X_SYNC_WORD_PRIVATE, LORA_TX_POWER, 8, tcxo);
+  return radio.std_init();
-  if (status != RADIOLIB_ERR_NONE) {
-    Serial.print("ERROR: radio init failed: ");
-    Serial.println(status);
-    return false;  // fail
-  }
-  
-  radio.setCRC(1);
-  
-#ifdef SX126X_CURRENT_LIMIT
-  radio.setCurrentLimit(SX126X_CURRENT_LIMIT);
-#endif
-#ifdef SX126X_DIO2_AS_RF_SWITCH
-  radio.setDio2AsRfSwitch(SX126X_DIO2_AS_RF_SWITCH);
-#endif
-#ifdef SX126X_RX_BOOSTED_GAIN
-  radio.setRxBoostedGainMode(SX126X_RX_BOOSTED_GAIN);
 #endif
 
-  return true;  // success
 }
 
 uint32_t radio_get_rng_seed() {