drm/i915: Add missing DC_OFF power domain->well mappings

Add the missing DC_OFF power domain -> DC_OFF power well mappings on all
platforms. This didn't cause a problem as the DC_OFF power domain is
only used on JSL, where the mapping was already correct.

Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221114122251.21327-8-imre.deak@intel.com