Status

Driver	Integration method	Upstream Status
SPI	Integrated in nuttx upstream	in nuttx
uwire	Integrated in nutx upstrean	in nuttx
Power off	Integrated in nuttx upstream,depend on SPI	in nuttx
Keypad		WIP
Screen	Integrated in nuttx upstream,depend on uwire	in nuttx
sercomm	wrapper driver	in nuttx
Serial	can now work without sercomm	in nuttx