dev: gcdb: add st7789H2 command mode panel file

Add changes to:
1. add panel header file to support SPI display on
st77889H2 panel
2. add SPI display init and power function
3. remove MIPI display macro to support SPI display.

Change-Id: I6b0af4832cd069b0dc90976715eedb220074e2fd
Signed-off-by: Wenjun Zhang <wjzhan@codeaurora.org>
6 files changed