arm64: dts: renesas: r8a7796: Use R-Car SDHI Gen3 fallback compat string

Use newly added R-Car SDHI Gen3 fallback compat string
in the DT of the r8a7796 SoC.

This should have no run-time effect as the driver matches against
the per-SoC compat string before considering the fallback compat string.
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

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

@@ -1380,7 +1380,8 @@ usb2_phy1: usb-phy@ee0a0200 {
 		};
 
 		sdhi0: sd@ee100000 {
-			compatible = "renesas,sdhi-r8a7796";
+			compatible = "renesas,sdhi-r8a7796",
+				     "renesas,rcar-gen3-sdhi";
 			reg = <0 0xee100000 0 0x2000>;
 			interrupts = <GIC_SPI 165 IRQ_TYPE_LEVEL_HIGH>;
 			clocks = <&cpg CPG_MOD 314>;
@@ -1391,7 +1392,8 @@ sdhi0: sd@ee100000 {
 		};
 
 		sdhi1: sd@ee120000 {
-			compatible = "renesas,sdhi-r8a7796";
+			compatible = "renesas,sdhi-r8a7796",
+				     "renesas,rcar-gen3-sdhi";
 			reg = <0 0xee120000 0 0x2000>;
 			interrupts = <GIC_SPI 166 IRQ_TYPE_LEVEL_HIGH>;
 			clocks = <&cpg CPG_MOD 313>;
@@ -1402,7 +1404,8 @@ sdhi1: sd@ee120000 {
 		};
 
 		sdhi2: sd@ee140000 {
-			compatible = "renesas,sdhi-r8a7796";
+			compatible = "renesas,sdhi-r8a7796",
+				     "renesas,rcar-gen3-sdhi";
 			reg = <0 0xee140000 0 0x2000>;
 			interrupts = <GIC_SPI 167 IRQ_TYPE_LEVEL_HIGH>;
 			clocks = <&cpg CPG_MOD 312>;
@@ -1413,7 +1416,8 @@ sdhi2: sd@ee140000 {
 		};
 
 		sdhi3: sd@ee160000 {
-			compatible = "renesas,sdhi-r8a7796";
+			compatible = "renesas,sdhi-r8a7796",
+				     "renesas,rcar-gen3-sdhi";
 			reg = <0 0xee160000 0 0x2000>;
 			interrupts = <GIC_SPI 168 IRQ_TYPE_LEVEL_HIGH>;
 			clocks = <&cpg CPG_MOD 311>;