DSS2: VRFB rotation and mirroring implemented.

DSS2 modified to accept the rotation_type input
to get the dma or VRFB rotation.

DSS2: VRFB: Changed to pass DSS mode to vrfb_setup instead of Bpp.

VRFB size registers requires the width to be halved when the
mode is YUV or UYVY.  So modifed to pass the mode to omap_vrfb_setup
function.

Code added by Tim Yamin for few bug fixes

Signed-off-by: Tim Yamin <plasm@roo.me.uk>
Signed-off-by: Hardik Shah <hardik.shah@ti.com>