msm: mdss: Correct RGB order for LUT programming in mdp3

MDP3 LUT programming has incorrect RGB order as per HW. The
correct order is to have color0 for green, color1 for red
and color2 for blue. Correcting color order in mdp3.

Change-Id: Ie7b6ab7f83e18495e83a05102e288fee6841e3ab
Signed-off-by: Krishna Chaitanya Parimi <cparimi@codeaurora.org>