arm64: dts: renesas: r8a779g0: Add SDHI node

Add a device node for the SD Card/MMC Interface on the Renesas R-Car V4H
(R8A779G0) SoC.

Based on a patch in the BSP by Takeshi Kihara.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Link: https://lore.kernel.org/r/d2d5cf982a380699483edf7a632441628ee73183.1665558371.git.geert+renesas@glider.be

arch/arm64/boot/dts/renesas/r8a779g0.dtsi

@@ -789,6 +789,20 @@ dmac1: dma-controller@e7351000 {
 			dma-channels = <16>;
 		};
 
+		mmc0: mmc@ee140000 {
+			compatible = "renesas,sdhi-r8a779g0",
+				     "renesas,rcar-gen4-sdhi";
+			reg = <0 0xee140000 0 0x2000>;
+			interrupts = <GIC_SPI 440 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&cpg CPG_MOD 706>,
+				 <&cpg CPG_CORE R8A779G0_CLK_SD0H>;
+			clock-names = "core", "clkh";
+			power-domains = <&sysc R8A779G0_PD_ALWAYS_ON>;
+			resets = <&cpg 706>;
+			max-frequency = <200000000>;
+			status = "disabled";
+		};
+
 		gic: interrupt-controller@f1000000 {
 			compatible = "arm,gic-v3";
 			#interrupt-cells = <3>;