drm/i915: Drop force_check_qgv

Remove the force_check_qgv flag and just fill the pipe_sagv_reject
bitmask properly during readout. This will cause the initial commit
to re-enable SAGV if possible.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250326162544.3642-9-ville.syrjala@linux.intel.com


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