staging: fbtft: fb_st7789v: Initialize the Display

Set Gamma Values and Register Values for the HSD20_IPS Panel

Signed-off-by: Oliver Graute <oliver.graute@kococonnector.com>
Link: https://lore.kernel.org/r/1589380299-21871-1-git-send-email-oliver.graute@gmail.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>