drm/i915/hdcp: unify connector logging format

It's customary to debug log connectors using [CONNECTOR:%d:%s]
format. Make the HDCP code follow suit.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20231219104746.1065431-1-jani.nikula@intel.com