drm: bridge: dw-hdmi: Pass drm_display_info to .mode_valid()

Replace the drm_connector pointer passed to the .mode_valid() function
with a const drm_display_info pointer, as that's all the function should
need. Use the display info passed to the bridge .mode_valid() operation
instead of retrieving it from the connector, to prepare for make
connector creation optional.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Reviewed-by: Neil Armstrong <narmstrong@baylibre.com>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20200526011505.31884-16-laurent.pinchart+renesas@ideasonboard.com

include/drm/bridge/dw_hdmi.h

@@ -8,7 +8,7 @@
 
 #include <sound/hdmi-codec.h>
 
-struct drm_connector;
+struct drm_display_info;
 struct drm_display_mode;
 struct drm_encoder;
 struct dw_hdmi;
@@ -137,7 +137,7 @@ struct dw_hdmi_plat_data {
 
 	/* Platform-specific mode validation (optional). */
 	enum drm_mode_status (*mode_valid)(struct dw_hdmi *hdmi, void *data,
-					   struct drm_connector *connector,
+					   const struct drm_display_info *info,
 					   const struct drm_display_mode *mode);
 
 	/* Vendor PHY support */