drm/i915/crt: Drop the unused ADPA_DPMS bit definitions

The ADPA_DPMS bit definitions are just an alias for the
sync disable bits, and unused one at that. Drop the
pointless definitions.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20241107161123.16269-4-ville.syrjala@linux.intel.com


Reviewed-by: Jani Nikula <jani.nikula@intel.com>