drm/i915: Reduce DDI clock gating printk level from NOTICE to DEBUG

No idea why the DDI clock gating print is done with drm_notice().
Just use drm_dbg_kms() since no one is going to be interested in
this under normal circumstances.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240605113336.11194-1-ville.syrjala@linux.intel.com


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