ARM: dts: cygnus: fix naming of pinctrl node

Remove 0x from pinctrl node to match device tree naming convention.
Signed-off-by: Scott Branden <scott.branden@broadcom.com>
Reviewed-by: Ray Jui <ray.jui@broadcom.com>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>

arch/arm/boot/dts/bcm-cygnus.dtsi

@@ -108,7 +108,7 @@ pcie1_phy: phy@1 {
 			};
 		};
 
-		pinctrl: pinctrl@0x0301d0c8 {
+		pinctrl: pinctrl@0301d0c8 {
 			compatible = "brcm,cygnus-pinmux";
 			reg = <0x0301d0c8 0x30>,
 			      <0x0301d24c 0x2c>;