ARM: dts: artpec: remove 0x prefix from clkctrl unit address

Remove 0x prefix from clkctrl unit address.

This silences the following dtc warning:
Warning (unit_address_format):
 Node /clkctrl@0xf8000000 unit name should not have leading "0x"
Signed-off-by: Niklas Cassel <niklas.cassel@axis.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

arch/arm/boot/dts/artpec6.dtsi

@@ -98,7 +98,7 @@ eth_phy_ref_clk: eth_phy_ref_clk {
 		clock-frequency = <125000000>;
 	};
 
-	clkctrl: clkctrl@0xf8000000 {
+	clkctrl: clkctrl@f8000000 {
 		#clock-cells = <1>;
 		compatible = "axis,artpec6-clkctrl";
 		reg = <0xf8000000 0x48>;