drm/bridge: Rename argument from crtc to bridge

Why is the argument to ->mode_valid() called "crtc"?
I guess a copy/paste error. Fix it.
Reviewed-by: NLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20180129095531.4557-1-linus.walleij@linaro.org

include/drm/drm_bridge.h

@@ -91,7 +91,7 @@ struct drm_bridge_funcs {
 	 *
 	 * drm_mode_status Enum
 	 */
-	enum drm_mode_status (*mode_valid)(struct drm_bridge *crtc,
+	enum drm_mode_status (*mode_valid)(struct drm_bridge *bridge,
 					   const struct drm_display_mode *mode);
 
 	/**