arm64: dts: renesas: r8a774b1: Connect Ethernet-AVB to IPMMU-DS0

Add IPMMU-DS0 to the Ethernet-AVB device node.

Based on work by Magnus Damm for the r8a7795.
Signed-off-by: Biju Das <biju.das@bp.renesas.com>
Link: https://lore.kernel.org/r/1569313375-53428-8-git-send-email-biju.das@bp.renesas.comSigned-off-by: Geert Uytterhoeven <geert+renesas@glider.be>

arch/arm64/boot/dts/renesas/r8a774b1.dtsi

@@ -919,6 +919,7 @@ avb: ethernet@e6800000 {
 			power-domains = <&sysc R8A774B1_PD_ALWAYS_ON>;
 			resets = <&cpg 812>;
 			phy-mode = "rgmii";
+			iommus = <&ipmmu_ds0 16>;
 			#address-cells = <1>;
 			#size-cells = <0>;
 			status = "disabled";