It's hard to see what is going on when the function mixes drm_
and intel_ types. Switch to intel_ types.

v2: Deal with another use of 'intel_crtc' being introduced
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191105171447.22111-2-ville.syrjala@linux.intel.comReviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>