Split the post_disable hooks for DP to g4x and vlv variants. We'll
need another variant soon, so this should make it look a bit cleaner.
Signed-off-by: NVille Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: NJani Nikula <jani.nikula@intel.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>