arm64: dts: renesas: r8a77995: Attach the SYS-DMAC to the IPMMU

Hook up SYS-DMAC0, SYS-DMAC1 and SYS-DMAC2 to IPMMU-DS0 and IPMMU-DS1
following the R-Car Gen3 Rev.1.00 (April 2018) datasheet.
Signed-off-by: Magnus Damm <damm+renesas@opensource.se>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

arch/arm64/boot/dts/renesas/r8a77995.dtsi

@@ -391,6 +391,10 @@ GIC_SPI 206 IRQ_TYPE_LEVEL_HIGH
 			resets = <&cpg 219>;
 			#dma-cells = <1>;
 			dma-channels = <8>;
+			iommus = <&ipmmu_ds0 0>, <&ipmmu_ds0 1>,
+			       <&ipmmu_ds0 2>, <&ipmmu_ds0 3>,
+			       <&ipmmu_ds0 4>, <&ipmmu_ds0 5>,
+			       <&ipmmu_ds0 6>, <&ipmmu_ds0 7>;
 		};
 
 		dmac1: dma-controller@e7300000 {
@@ -415,6 +419,10 @@ GIC_SPI 310 IRQ_TYPE_LEVEL_HIGH
 			resets = <&cpg 218>;
 			#dma-cells = <1>;
 			dma-channels = <8>;
+			iommus = <&ipmmu_ds1 0>, <&ipmmu_ds1 1>,
+			       <&ipmmu_ds1 2>, <&ipmmu_ds1 3>,
+			       <&ipmmu_ds1 4>, <&ipmmu_ds1 5>,
+			       <&ipmmu_ds1 6>, <&ipmmu_ds1 7>;
 		};
 
 		dmac2: dma-controller@e7310000 {
@@ -439,6 +447,10 @@ GIC_SPI 423 IRQ_TYPE_LEVEL_HIGH
 			resets = <&cpg 217>;
 			#dma-cells = <1>;
 			dma-channels = <8>;
+			iommus = <&ipmmu_ds1 16>, <&ipmmu_ds1 17>,
+			       <&ipmmu_ds1 18>, <&ipmmu_ds1 19>,
+			       <&ipmmu_ds1 20>, <&ipmmu_ds1 21>,
+			       <&ipmmu_ds1 22>, <&ipmmu_ds1 23>;
 		};
 
 		ipmmu_ds0: mmu@e6740000 {