ARM: dts: socfpga: drop 0x from unit address

By coding style, unit address should not start with 0x.

Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Krzysztof Kozlowski <[e-mail]>

arch/arm/boot/dts/socfpga.dtsi

···
 			arm,prefetch-offset = <7>;
 		};
 
-		l3regs@0xff800000 {
+		l3regs@ff800000 {
 			compatible = "altr,l3regs", "syscon";
 			reg = <0xff800000 0x1000>;
 		};