Add documentation for r8a77965 compatible string to rcar-dmac device
tree bindings documentation.
Signed-off-by: NJacopo Mondi <jacopo+renesas@jmondi.org>
Reviewed-by: NGeert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: NSimon Horman <horms+renesas@verge.net.au>
Signed-off-by: NRob Herring <robh@kernel.org>