drm/i915: s/crtc_state/new_crtc_state/ etc.

intel_plane_atomic_calc_changes() deals with both the old and
new crtc/plane states. Make the variable names reflect that
more clearly.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210514125751.17075-2-ville.syrjala@linux.intel.com


Reviewed-by: Stanislav Lisovskiy <stanislav.lisovskiy@intel.com>