drm/dp: use DRM_DEBUG_DP() instead of drm_dbg for logging

We have a wrapper for a reason.
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190121112758.10978-1-jani.nikula@intel.com

drivers/gpu/drm/drm_dp_helper.c

@@ -194,11 +194,11 @@ drm_dp_dump_access(const struct drm_dp_aux *aux,
 	const char *arrow = request == DP_AUX_NATIVE_READ ? "->" : "<-";
 
 	if (ret > 0)
-		drm_dbg(DRM_UT_DP, "%s: 0x%05x AUX %s (ret=%3d) %*ph\n",
-			aux->name, offset, arrow, ret, min(ret, 20), buffer);
+		DRM_DEBUG_DP("%s: 0x%05x AUX %s (ret=%3d) %*ph\n",
+			     aux->name, offset, arrow, ret, min(ret, 20), buffer);
 	else
-		drm_dbg(DRM_UT_DP, "%s: 0x%05x AUX %s (ret=%3d)\n",
-			aux->name, offset, arrow, ret);
+		DRM_DEBUG_DP("%s: 0x%05x AUX %s (ret=%3d)\n",
+			     aux->name, offset, arrow, ret);
 }
 
 /**