drm/msm/sde: fix color component order

SDE hardware handles the color component without
endianness. So, RGBA component keeps the "A"
component on the lowest memory address that is
LSB + lower address = Little endian format.
The same applies to UBWC formats also. This patch
fixes the color component order based on above
requirement.

Change-Id: I8cc03acef97f9777244bb3cad68e9992e22c3dd4
Signed-off-by: Dhaval Patel <pdhaval@codeaurora.org>