arm64: dts: renesas: r8a779g0: Add RPC node

Add a device node for the SPI Multi I/O Bus Controller (RPC-IF) on the
Renesas R-Car V4H (R8A779G0) SoC.
Signed-off-by: Hai Pham <hai.pham.ud@renesas.com>
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Link: https://lore.kernel.org/r/6da7a035d56a943336f68dc0da77a47dba3dd69e.1665583435.git.geert+renesas@glider.be

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

@@ -803,6 +803,22 @@ mmc0: mmc@ee140000 {
 			status = "disabled";
 		};
 
+		rpc: spi@ee200000 {
+			compatible = "renesas,r8a779g0-rpc-if",
+				     "renesas,rcar-gen4-rpc-if";
+			reg = <0 0xee200000 0 0x200>,
+			      <0 0x08000000 0 0x04000000>,
+			      <0 0xee208000 0 0x100>;
+			reg-names = "regs", "dirmap", "wbuf";
+			interrupts = <GIC_SPI 225 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&cpg CPG_MOD 629>;
+			power-domains = <&sysc R8A779G0_PD_ALWAYS_ON>;
+			resets = <&cpg 629>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+			status = "disabled";
+		};
+
 		gic: interrupt-controller@f1000000 {
 			compatible = "arm,gic-v3";
 			#interrupt-cells = <3>;