arm64: dts: renesas: r9a07g054: Fillup the sbc stub node

Fillup the sbc stub node in RZ/V2L (R9A07G054) SoC DTSI.
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Biju Das <biju.das.jz@bp.renesas.com>
Link: https://lore.kernel.org/r/20220227203744.18355-7-prabhakar.mahadev-lad.rj@bp.renesas.comSigned-off-by: Geert Uytterhoeven <geert+renesas@glider.be>

arch/arm64/boot/dts/renesas/r9a07g054.dtsi

@@ -398,12 +398,20 @@ channel@7 {
 		};
 
 		sbc: spi@10060000 {
+			compatible = "renesas,r9a07g054-rpc-if",
+				     "renesas,rzg2l-rpc-if";
 			reg = <0 0x10060000 0 0x10000>,
 			      <0 0x20000000 0 0x10000000>,
 			      <0 0x10070000 0 0x10000>;
+			reg-names = "regs", "dirmap", "wbuf";
+			interrupts = <GIC_SPI 41 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&cpg CPG_MOD R9A07G054_SPI_CLK2>,
+				 <&cpg CPG_MOD R9A07G054_SPI_CLK>;
+			resets = <&cpg R9A07G054_SPI_RST>;
+			power-domains = <&cpg>;
 			#address-cells = <1>;
 			#size-cells = <0>;
-			/* place holder */
+			status = "disabled";
 		};
 
 		cpg: clock-controller@11010000 {