Fix Critical Error #3 for LilyGo T-Echo

[Logicbloke]

Fix Critical Error #3

Hello, I followed the discussion a bit on #6294 and noticed that it needs TCXO_OPTIONAL defined to work and that setting NO_EXT_GPIO to 1 breaks it.

It's been broken for T-Echo since v2.5.20.

I managed to compile and flash on my T-Echo and it fixes the problem.

Kind Regards, Taha

🤝 Attestations

• I have tested that my proposed changes behave as described.
• I have tested that my proposed changes do not cause any obvious regressions on the following devices:
  • Heltec (Lora32) V3
  • LilyGo T-Deck
  • LilyGo T-Beam
  • RAK WisBlock 4631
  • Seeed Studio T-1000E tracker card
  • Other (please specify below)
    LilyGo T-Echo