drm/msm/sde: Add support to bump up data bus when needed for PP

Some of the color-proc features require to program quite a lot registers
when they are enabled. And if reg_dma support for the feature is not
enabled, programing those registers may take too long and cause
potential frame drops.
This change adds the functionality to bump up the data bus when needed
to avoid the above issues.

Change-Id: I3022868092d777cc6be10aa70320ae4137239cf8
Signed-off-by: Ping Li <pingli@codeaurora.org>