waveform seems normal, still not work
found the root cause, not possible using spi

nokia6100 uses 9-bit data format, but stm32 only supports 8-bit
or 16-bit on spi bus per data frame. So we may only rely on usart or
bitbang mode.
Thus this trial draws to a close for now.
Merge branch 'lcd' of github.com:librae8226/nuttx-git into lcd

Conflicts:
	nuttx/configs/maple/nx/defconfig
	nuttx/configs/maple/src/up_lcd.c