dt-bindings: mmc: renesas_sdhi: Document r8a77961 support

Document support for the SDHI controller in the Renesas R-Car M3-W+
(R8A77961) SoC.

Update all references to R-Car M3-W from "r8a7796" to "r8a77960", to
avoid confusion between R-Car M3-W (R8A77960) and M3-W+.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Link: https://lore.kernel.org/r/20191205134349.6410-2-geert+renesas@glider.beSigned-off-by: Ulf Hansson <ulf.hansson@linaro.org>

Documentation/devicetree/bindings/mmc/renesas,sdhi.txt

@@ -23,7 +23,8 @@ Required properties:
 		"renesas,sdhi-r8a7793" - SDHI IP on R8A7793 SoC
 		"renesas,sdhi-r8a7794" - SDHI IP on R8A7794 SoC
 		"renesas,sdhi-r8a7795" - SDHI IP on R8A7795 SoC
-		"renesas,sdhi-r8a7796" - SDHI IP on R8A7796 SoC
+		"renesas,sdhi-r8a7796" - SDHI IP on R8A77960 SoC
+		"renesas,sdhi-r8a77961" - SDHI IP on R8A77961 SoC
 		"renesas,sdhi-r8a77965" - SDHI IP on R8A77965 SoC
 		"renesas,sdhi-r8a77970" - SDHI IP on R8A77970 SoC
 		"renesas,sdhi-r8a77980" - SDHI IP on R8A77980 SoC