drm/i915: Simplify modeset_get_crtc_power_domains() arguments

Pass just the crtc state to modeset_get_crtc_power_domains(). We
can get the crtc from therein.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190701160550.24205-2-ville.syrjala@linux.intel.com


Reviewed-by: Imre Deak <imre.deak@intel.com>