Extract the PLANE_AUX_DIST stuff into a small helper to
dclutter skl_program_plane_arm() a bit.
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20211201152552.7821-13-ville.syrjala@linux.intel.comReviewed-by: José Roberto de Souza <jose.souza@intel.com>