Add DT bindings document for the Qualcomm NAND controller driver.
Reviewed-by: NBoris Brezillon <boris.brezillon@free-electrons.com>
Acked-by: NRob Herring <robh@kernel.org>
Signed-off-by: NArchit Taneja <architt@codeaurora.org>
Signed-off-by: NBrian Norris <computersforpeace@gmail.com>