there is a bus bridge for graphics 2D module lost in current dts, this patch takes it
back.
Signed-off-by: NJiansong Chen <jiansong.chen@csr.com>
Signed-off-by: NBarry Song <Baohua.Song@csr.com>
Signed-off-by: NOlof Johansson <olof@lixom.net>