ARM: Dove: Add pinctrl clock to DT

During merge of the mvebu patches a clock gate for pinctrl was
lost. This patch just readds the clock gate.
Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Signed-off-by: Jason Cooper <jason@lakedaemon.net>

arch/arm/boot/dts/dove.dtsi

@@ -117,6 +117,7 @@ gpio2: gpio@e8400 {
 		pinctrl: pinctrl@d0200 {
 			compatible = "marvell,dove-pinctrl";
 			reg = <0xd0200 0x10>;
+			clocks = <&gate_clk 22>;
 		};
 
 		spi0: spi@10600 {