Add QSPI bus support

[Forairaaaaa]

Hi!
I've been working on a AMOLED screen uses Quad-SPI interface, trying to play this screen with LovyanGFX~
And it works well now:

I add Bus_QSPI to achieve 4-bit data line width (Quad Output) like this:

32 00 2C 00 is cmd send in 1-bit way, and the flowing 07 E0 are data in 4-bit way

I also add Panel_SH8601Z to suit the display IC SH8601Z 's need :

SH8601Z0 DataSheet Preliminary V0.0.pdf

Best Wishes

[lovyan03]

@Forairaaaaa
Sorry for the late reply.
I am holding off on the merge because I do not have the actual device and cannot check the operation.

[Forairaaaaa]

@Forairaaaaa Sorry for the late reply. I am holding off on the merge because I do not have the actual device and cannot check the operation.
It's okay~