Sx1262 Improvements - LoRa Radio reset and DC-DC regulator

[entr0p1]

Several fixes/improvements for SX1262 radios:

1. Implemented radio resets for some TX and RX fault conditions. Radio will reset, then re-init and go back to receive state. Fault codes that will trigger reset:
   RADIOLIB_ERR_TX_TIMEOUT
   RADIOLIB_ERR_SPI_CMD_FAILED
   RADIOLIB_ERR_SPI_CMD_INVALID
   RADIOLIB_ERR_SPI_WRITE_FAILED
   RADIOLIB_ERR_SPI_READ_FAILED
   RADIOLIB_ERR_CHIP_NOT_FOUND
   RADIOLIB_ERR_DEVICE_BUSY

On SX1262-based variants without the P_LORA_RESET pin configured, this should NO-OP.

2. Added SX1262 DC-DC enable code (separate to the board's DC-DC) and platform.ini flag to enable it on supported nodes. Enabled on RAK4631 as this is confirmed supported.

[fschrempf]

Great work! Here are some things I've noticed.

And maybe you could clean up the commits a little bit so there is one commit per logical change. You can just force-push if you cleaned up the history.

[entr0p1]

Great work! Here are some things I've noticed.

Thanks heaps for your time reviewing this! Great points all around and I'll respond/fix accordingly.

And maybe you could clean up the commits a little bit so there is one commit per logical change. You can just force-push if you cleaned up the history.

Good call - I seem to have a concrete skull when it comes to learning how Git works haha :) will fix that up too, cheers

[entr0p1]

@fschrempf would you mind taking another look for me now? All your comments should be resolved.