ARM: dts: imx6q: Add pinctrl for ecspi3

Add a group of pins to allow ecspi3 to be used on imx6q.
Signed-off-by: Sean Cross <xobs@kosagi.com>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>

arch/arm/boot/dts/imx6q.dtsi

@@ -97,6 +97,16 @@ MX6Q_PAD_EIM_D16__ECSPI1_SCLK 0x100b1
 					};
 				};
 
+				ecspi3 {
+					pinctrl_ecspi3_1: ecspi3grp-1 {
+						fsl,pins = <
+							MX6Q_PAD_DISP0_DAT2__ECSPI3_MISO 0x100b1
+							MX6Q_PAD_DISP0_DAT1__ECSPI3_MOSI 0x100b1
+							MX6Q_PAD_DISP0_DAT0__ECSPI3_SCLK 0x100b1
+						>;
+					};
+				};
+
 				enet {
 					pinctrl_enet_1: enetgrp-1 {
 						fsl,pins = <