drm/i915/dpio: s/VLV_REF_DW13/VLV_REF_DW11/

Our VLV_REF_DW13 is actually VLV_REF_DW11. Rename it.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240422083457.23815-3-ville.syrjala@linux.intel.com


Reviewed-by: Jani Nikula <jani.nikula@intel.com>