arm: boot: dts: artpec6: Remove unnecessary interrupt-parent property from sub-nodes

"interrupt-parent" property is declared in root node, so it is global
to all nodes. This property is re-declared in few sub-nodes. To avoid
duplication this property is removed from following sub-nodes:
pmu, amba@0, amba@0/ethernet.
Signed-off-by: Surender Polsani <surenderp@techveda.org>
Acked-by: Niklas Cassel <niklas.cassel@axis.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

arch/arm/boot/dts/artpec6.dtsi

@@ -151,7 +151,6 @@ pmu {
 		interrupts = <GIC_SPI 0 IRQ_TYPE_LEVEL_HIGH>,
 			<GIC_SPI 1 IRQ_TYPE_LEVEL_HIGH>;
 		interrupt-affinity = <&cpu0>, <&cpu1>;
-		interrupt-parent = <&intc>;
 	};
 
 	pcie: pcie@f8050000 {
@@ -185,7 +184,6 @@ amba@0 {
 		compatible = "simple-bus";
 		#address-cells = <0x1>;
 		#size-cells = <0x1>;
-		interrupt-parent = <&intc>;
 		ranges;
 		dma-ranges = <0x80000000 0x00000000 0x40000000>;
 		dma-coherent;
@@ -195,7 +193,6 @@ ethernet: ethernet@f8010000 {
 			clocks = <&eth_phy_ref_clk>,
 				<&clkctrl ARTPEC6_CLK_ETH_ACLK>;
 			compatible = "snps,dwc-qos-ethernet-4.10";
-			interrupt-parent = <&intc>;
 			interrupts = <GIC_SPI 98 IRQ_TYPE_LEVEL_HIGH>;
 			reg = <0xf8010000 0x4000>;