drm/i915: Pass intel_connector to intel_panel_{init,fini}()

All the other intel_panel functions take struct intel_connector,
so might as well make init()/fini() take one as well.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220323182935.4701-2-ville.syrjala@linux.intel.com


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