drm/i915/dvo: s/intel_encoder/encoder/ etc.

Remove the pointless intel_ namespace from our encoder/connector
variables.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221118105525.27254-8-ville.syrjala@linux.intel.com


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