arm: spear6xx: remove unneeded pinctrl properties in spear600-evb

The spear6xx doesn't have a pinctrl driver, since the pinmux is globally
defined through a single register, generally configured by the
firmware/bootloader.

Therefore, the pinctrl related properties in spear600-evb.dts are not
necessary.
Signed-off-by: NThomas Petazzoni <thomas.petazzoni@free-electrons.com>
Acked-by: NViresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: NOlof Johansson <olof@lixom.net>

arch/arm/boot/dts/spear600-evb.dts

@@ -96,14 +96,10 @@
 
 &uart0 {
 	status = "okay";
-	pinctrl-names = "default";
-	pinctrl-0 = <>;
 };
 
 &uart1 {
 	status = "okay";
-	pinctrl-names = "default";
-	pinctrl-0 = <>;
 };
 
 &rtc {