drm/i915: Pimp encoder ddc_pin/aux_ch debug messages

Use encoder->name rather than port_name() in the debug messages
so that they actually make more sense.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230216231312.32664-2-ville.syrjala@linux.intel.com


Reviewed-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>