* - supporting 16/24/32bit RGB/TFT raster Mode (not using palette)
* - sets up LCD controller as in 'am335x_lcdpanel' struct given
* - starts output DMA from gd->fb_base buffer
* - supporting 16/24/32bit RGB/TFT raster Mode (not using palette)
* - sets up LCD controller as in 'am335x_lcdpanel' struct given
* - starts output DMA from gd->fb_base buffer