Add maximum power limit

variants/heltec_tower_v2/platformio.ini

@@ -12,6 +12,7 @@ build_flags = ${nrf52_base.build_flags}
   -D RADIO_CLASS=CustomSX1262
   -D WRAPPER_CLASS=CustomSX1262Wrapper
   -D LORA_TX_POWER=12
+  -D MAX_LORA_TX_POWER=22 ; Max SX1262 output -> ~29dBm at antenna
   -D SX126X_CURRENT_LIMIT=140
   -D SX126X_RX_BOOSTED_GAIN=1
 build_src_filter = ${nrf52_base.build_src_filter}