drivers: video: Add Support for Himax HX8238D Panel

* SPI based initialization for HX8238D
* Resolution: 320x240
* Color-Mode: RGB

* Initial Work is done by Sjoerd Simons
  https://gitlab.apertis.org/packaging/u-boot/-/blob\


  /5f259720e3e64965d50da89a841ad6eb256a47df/debian/patches\
  /apertis/powertools/0005-video-Add-Himax-HX8238-D-driver.patch

* Tested on Bosch Guardian Board

Cc: Sjoerd Simons <sjoerd.simons@collabora.co.uk>
Signed-off-by: Moses Christopher <BollavarapuMoses.Christopher@in.bosch.com>