drm/msm: add mode definition of RGB and YUV into DRM_MODE_FLAG_ALL

Currently drm code will check current mode whether included in
DRM_MODE_FLAG_ALL before that mode expose to SDM, if not, the mode
will be removed and SDM can't get the mode, so add RGB and YUV mode
definition into DRM_MODE_FLAG_ALL to avoid mode validation failure.

Change-Id: I0e33bbb58309257446cf76dcda19f268dcda4320
Signed-off-by: Lei Chen <chenlei@codeaurora.org>