arm64: dts: renesas: r8a779a0: Update CAN-FD to R-Car Gen4 compatible value

Despite the name, R-Car V3U is the first member of the R-Car Gen4
family.  Hence update the compatible property in the CAN-FD device node
to include the family-specific compatible value for R-Car Gen4.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/9823058fa57156e88a084a4a99fc8525af1686ff.1678705389.git.geert+renesas@glider.be

Author: geertu

arch/arm64/boot/dts/renesas/r8a779a0.dtsi

@@ -606,7 +606,8 @@
 		};
 
 		canfd: can@e6660000 {
-			compatible = "renesas,r8a779a0-canfd";
+			compatible = "renesas,r8a779a0-canfd",
+				     "renesas,rcar-gen4-canfd";
 			reg = <0 0xe6660000 0 0x8000>;
 			interrupts = <GIC_SPI 25 IRQ_TYPE_LEVEL_HIGH>,
 					<GIC_SPI 26 IRQ_TYPE_LEVEL_HIGH>;