drm: msm: move display mmrm enable config to platform config
This change moves mmrm enable flag to the display platform config files.
This allows to selectively enable mmrm in the display driver,
so other platforms not requiring mmrm in their build can compile
with their own config files.
Change-Id: I02415c6a22252dfc483a3da03b623351811ffc01
Signed-off-by: Christina Oliveira <[email protected]>