mdss: ppp: Add support for MDP_BGRX_8888 in mdp3 ppp

Support for MDP_BGRX_8888 is required, so we are adding it in.

Change-Id: I43e9b6ccc63f7fd7b83fa4b3b24828f58b56b1fc
Signed-off-by: Terence Hampson <thampson@codeaurora.org>
Merge "mdss: ppp: Add support for MDP_BGRX_8888 in mdp3 ppp"