ARM: dts: imx27-phytec-phycore-rdk: Add missing pinctrl definition for SPI CS1

This patch adds missing pinctrl definition for SPI chipselect 1.
Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>

arch/arm/boot/dts/imx27-phytec-phycore-rdk.dts

@@ -15,6 +15,7 @@ / {
 };
 
 &cspi1 {
+	pinctrl-0 = <&pinctrl_cspi1>, <&pinctrl_cspi1cs1>;
 	fsl,spi-num-chipselects = <2>;
 	cs-gpios = <&gpio4 28 GPIO_ACTIVE_HIGH>,
 		   <&gpio4 27 GPIO_ACTIVE_LOW>;
@@ -36,6 +37,12 @@ camgpio: pca9536@41 {
 
 &iomuxc {
 	imx27_phycore_rdk {
+		pinctrl_cspi1cs1: cspi1cs1grp {
+			fsl,pins = <
+				MX27_PAD_CSPI1_SS1__GPIO4_27 0x0
+			>;
+		};
+
 		pinctrl_i2c1: i2c1grp {
 			/* Add pullup to DATA line */
 			fsl,pins = <