This patch adds the DT bindings document for newly added Broadcom
SBA RAID driver.
Acked-by: NRob Herring <robh@kernel.org>
Reviewed-by: NRay Jui <ray.jui@broadcom.com>
Reviewed-by: NScott Branden <scott.branden@broadcom.com>
Signed-off-by: NAnup Patel <anup.patel@broadcom.com>
Signed-off-by: NVinod Koul <vinod.koul@intel.com>