msm_fb: Fix color format mapping between V4L2 and MDP

Add V4L2_PIX_FMT_UYVY, V4L2_PIX_FMT_YUYV, V4L2_PIX_FMT_YVU420
format mapping in video driver. Add support  for
MDP_CBYCRY_H2V1 format for mdp4.

Change-Id: I4d5f1ae4ea71aa57c168f7143ff15f79e27cc1d0
Signed-off-by: Pawan Kumar <pavaku@codeaurora.org>