ARC: AXS10x: DTS: Remove unused interrupt properties

Some device tree nodes (like ethernet, ohci, ehci) in axs10x_mb.dtsi
were copied from linux device tree, so they have interrupts properties.
As we don't use interrupts in uboot we don't have interrupt controller
node in AXS10x device tree. In result we get warnings when we compile
such device tree.

So remove unused interrupts properties to get rid of this warnings.

Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>

arch/arc/dts/axs10x_mb.dtsi

@@ -31,11 +31,8 @@
 		};
 
 		ethernet@18000 {
-			#interrupt-cells = <1>;
 			compatible = "altr,socfpga-stmmac";
 			reg = < 0x18000 0x2000 >;
-			interrupts = < 25 >;
-			interrupt-names = "macirq";
 			phy-mode = "gmii";
 			snps,pbl = < 32 >;
 			clocks = <&apbclk>;
@@ -46,13 +43,11 @@
 		ehci@0x40000 {
 			compatible = "generic-ehci";
 			reg = < 0x40000 0x100 >;
-			interrupts = < 8 >;
 		};
 
 		ohci@0x60000 {
 			compatible = "generic-ohci";
 			reg = < 0x60000 0x100 >;
-			interrupts = < 8 >;
 		};
 
 		uart0: serial0@22000 {