drivers/video/msm: restore update_lcdc_lut capabilities for MDP devices

Signed-off-by: Paul Reioux <reioux@gmail.com>
mach-msm/Kconfig: add LCDC LUT

Signed-off-by: Paul Reioux <reioux@gmail.com>
drivers/video/msm/mdp.c: fix merge derp!

Signed-off-by: Paul Reioux <reioux@gmail.com>