arm64: dts: r8a7796: Use R-Car Gen 3 fallback binding for msiof nodes

Use recently added R-Car Gen 3 fallback binding for msiof nodes in
DT for r8a7796 SoC.

This has no run-time effect for the current driver as the initialisation
sequence is the same for the SoC-specific binding for r8a7796 and the
fallback binding for R-Car Gen 3.
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>

arch/arm64/boot/dts/renesas/r8a7796.dtsi

@@ -485,7 +485,8 @@ scif2: serial@e6e88000 {
 		};
 
 		msiof0: spi@e6e90000 {
-			compatible = "renesas,msiof-r8a7796";
+			compatible = "renesas,msiof-r8a7796",
+				     "renesas,rcar-gen3-msiof";
 			reg = <0 0xe6e90000 0 0x0064>;
 			interrupts = <GIC_SPI 156 IRQ_TYPE_LEVEL_HIGH>;
 			clocks = <&cpg CPG_MOD 211>;
@@ -499,7 +500,8 @@ msiof0: spi@e6e90000 {
 		};
 
 		msiof1: spi@e6ea0000 {
-			compatible = "renesas,msiof-r8a7796";
+			compatible = "renesas,msiof-r8a7796",
+				     "renesas,rcar-gen3-msiof";
 			reg = <0 0xe6ea0000 0 0x0064>;
 			interrupts = <GIC_SPI 157 IRQ_TYPE_LEVEL_HIGH>;
 			clocks = <&cpg CPG_MOD 210>;
@@ -513,7 +515,8 @@ msiof1: spi@e6ea0000 {
 		};
 
 		msiof2: spi@e6c00000 {
-			compatible = "renesas,msiof-r8a7796";
+			compatible = "renesas,msiof-r8a7796",
+				     "renesas,rcar-gen3-msiof";
 			reg = <0 0xe6c00000 0 0x0064>;
 			interrupts = <GIC_SPI 158 IRQ_TYPE_LEVEL_HIGH>;
 			clocks = <&cpg CPG_MOD 209>;
@@ -526,7 +529,8 @@ msiof2: spi@e6c00000 {
 		};
 
 		msiof3: spi@e6c10000 {
-			compatible = "renesas,msiof-r8a7796";
+			compatible = "renesas,msiof-r8a7796",
+				     "renesas,rcar-gen3-msiof";
 			reg = <0 0xe6c10000 0 0x0064>;
 			interrupts = <GIC_SPI 159 IRQ_TYPE_LEVEL_HIGH>;
 			clocks = <&cpg CPG_MOD 208>;