UBRC is a read-only register, so we should not store and restore it inside
imx_flush_buffer().
Reported-by: NFugang Duan <B38611@freescale.com>
Signed-off-by: NFabio Estevam <fabio.estevam@freescale.com>
Acked-by: NFugang Duan <B38611@freescale.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>