fix: enable DIO3 TCXO and DIO2 RF switch for MeshAdv Mini preset

The E22-900M22S module on the MeshAdv Mini requires DIO3-powered TCXO
and DIO2-controlled RF switching, per the vendor's official config.
Without these flags the radio fails with TX timeouts (IRQ 0x0000) or
transmits no usable RF despite appearing healthy.

Matches the existing meshadv and zebra preset pattern.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Ma64MsP8cfq15jRhsMhr6s

radio-settings.json

@@ -95,6 +95,8 @@
       "txled_pin": -1,
       "rxled_pin": -1,
       "tx_power": 22,
+      "use_dio3_tcxo": true,
+      "use_dio2_rf": true,
       "preamble_length": 32
     },
     "meshadv": {