T-Deck Max & Pro support updates (#582)

- Created kernel driver for T-Deck Max & Pro display (needs work, doesn't refresh reliably on T-Deck Pro)
- Created T-Deck Pro device implementation (incubating)

Drivers/gdeq031t10-module/README.md

@@ -0,0 +1,11 @@
+# GDEQ031T10 Display Driver
+
+A kernel driver for the GoodDisplay `GDEQ031T10`, a 3.1" 240x320 SPI e-paper panel
+(UC8253-family controller) used by the LilyGO T-Deck Pro/Max.
+
+The command sequence (panel setting, power on/off, fast/partial LUT timings, deep
+sleep) is ported from the vendor reference driver in
+[Xinyuan-LilyGO/T-Deck-MAX](https://github.com/Xinyuan-LilyGO/T-Deck-MAX)
+(`examples/Elink_paper/GDEQ031T10_Arduino/Display_EPD_W21.cpp`). 
+
+License: [Apache v2.0](LICENSE-Apache-2.0.md)