DRM: drm_crtc_helper.h doesn't actually need i2c.h

Remove an include that isn't actually needed to prevent needless
rebuilds.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Dave Airlie <airlied@redhat.com>

include/drm/drm_crtc_helper.h

@@ -33,7 +33,6 @@
 #ifndef __DRM_CRTC_HELPER_H__
 #define __DRM_CRTC_HELPER_H__
 
-#include <linux/i2c.h>
 #include <linux/spinlock.h>
 #include <linux/types.h>
 #include <linux/idr.h>