ARM: dts: r8a7794: Use R-Car Gen 2 fallback binding for iic nodes

Use recently added R-Car Gen 2 fallback binding for iic nodes in
DT for r8a7794 SoC.

This has no run-time effect for the current driver as the initialisation
sequence is the same for the SoC-specific binding for r8a7794 and the
fallback binding for R-Car Gen 2.

Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>

arch/arm/boot/dts/r8a7794.dtsi

@@ -683,7 +683,8 @@
 	};
 
 	i2c6: i2c@e6500000 {
-		compatible = "renesas,iic-r8a7794", "renesas,rmobile-iic";
+		compatible = "renesas,iic-r8a7794", "renesas,rcar-gen2-iic",
+			     "renesas,rmobile-iic";
 		reg = <0 0xe6500000 0 0x425>;
 		interrupts = <GIC_SPI 174 IRQ_TYPE_LEVEL_HIGH>;
 		clocks = <&mstp3_clks R8A7794_CLK_IIC0>;
@@ -697,7 +698,8 @@
 	};
 
 	i2c7: i2c@e6510000 {
-		compatible = "renesas,iic-r8a7794", "renesas,rmobile-iic";
+		compatible = "renesas,iic-r8a7794", "renesas,rcar-gen2-iic",
+			     "renesas,rmobile-iic";
 		reg = <0 0xe6510000 0 0x425>;
 		interrupts = <GIC_SPI 175 IRQ_TYPE_LEVEL_HIGH>;
 		clocks = <&mstp3_clks R8A7794_CLK_IIC1>;