ARM: dts: renesas: r9a06g032: Remove duplicate interrupt-parent

As the "soc" node already specifies the GIC as the interrupt-parent,
there is no reason to repeat this in any of its subnodes.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/7ac440ec923f5d781a93c4344d6fedf280c3fa72.1712064816.git.geert+renesas@glider.be

arch/arm/boot/dts/renesas/r9a06g032.dtsi

@@ -319,7 +319,6 @@ dma1: dma-controller@40105000 {
 		gmac2: ethernet@44002000 {
 			compatible = "renesas,r9a06g032-gmac", "renesas,rzn1-gmac", "snps,dwmac";
 			reg = <0x44002000 0x2000>;
-			interrupt-parent = <&gic>;
 			interrupts = <GIC_SPI 37 IRQ_TYPE_LEVEL_HIGH>,
 				     <GIC_SPI 39 IRQ_TYPE_LEVEL_HIGH>,
 				     <GIC_SPI 38 IRQ_TYPE_LEVEL_HIGH>;