drm: Extract drm_bridge.h

We don't want to burry the bridge structures kerneldoc in drm_crtc.h.

Cc: Archit Taneja <archit.taneja@gmail.com>
Reviewed-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20160831160913.12991-3-daniel.vetter@ffwll.ch
diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h
index e4e545e..51a15de 100644
--- a/include/drm/drm_connector.h
+++ b/include/drm/drm_connector.h
@@ -27,6 +27,10 @@
 #include <linux/ctype.h>
 #include <drm/drm_mode_object.h>
 
+#include <uapi/drm/drm_mode.h>
+
+struct drm_device;
+
 struct drm_connector_helper_funcs;
 struct drm_device;
 struct drm_crtc;