ata: sata_rcar: Add r8a77965 support

Update the binding docs for Renesas R-Car M3-N. No driver changes are
needed.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be
Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Tejun Heo <tj@kernel.org>

Documentation/devicetree/bindings/ata/sata_rcar.txt

@@ -8,6 +8,7 @@ Required properties:
 			  - "renesas,sata-r8a7791" for R-Car M2-W
 			  - "renesas,sata-r8a7793" for R-Car M2-N
 			  - "renesas,sata-r8a7795" for R-Car H3
+			  - "renesas,sata-r8a77965" for R-Car M3-N
 			  - "renesas,rcar-gen2-sata" for a generic R-Car Gen2 compatible device
 			  - "renesas,rcar-gen3-sata" for a generic R-Car Gen3 compatible device
 			  - "renesas,rcar-sata" is deprecated