sdm: Disable HDR handling for non-primary displays

- ColorModes are supported only on primary displays and doesn't
  apply for secondary(external or virtual) displays.
- DPPS is also enabled only for primary display and disabling for
  one display is enough, when two displays are connected.
- So handling of any of the two above is not needed for other
  displays.

Change-Id: Idd0b44f072bb72d98b3e42a58094cb71091a82c5
Crs-fixed: 1116628
1 file changed