drm/i915: s/pipe_config/new_crtc_state/ intel_{pre,post}_plane_update()

Replace the old world 'pipe_config' variable name with the new thing.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191127190556.1574-4-ville.syrjala@linux.intel.com


Reviewed-by: José Roberto de Souza <jose.souza@intel.com>