drm/i915: Enable DDI A/B AUX interrupts on LNL+

drm/i915: Enable DDI A/B AUX interrupts on LNL+

Apparently the DDI A/B AUX interrupts move onto the PICA side
on LNL. Unmask them properly so that we actually get the
interrupts. The interrupt handler was already trying to handle
them despite the interrupts remaining masked.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patch.msgid.link/20251119185310.10428-2-ville.syrjala@linux.intel.com
Reviewed-by: Jani Nikula <jani.nikula@intel.com>