ARM: mx28: Add SPI 2 pinmux into imx28.dtsi

Add this SSP port 2 pin multiplexing configuration into the imx28.dtsi file.
Signed-off-by: NMarek Vasut <marex@denx.de>
Cc: Chris Ball <cjb@laptop.org>
Cc: Fabio Estevam <fabio.estevam@freescale.com>
Cc: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: NShawn Guo <shawn.guo@linaro.org>

arch/arm/boot/dts/imx28.dtsi

@@ -528,6 +528,19 @@
 					fsl,voltage = <1>;
 					fsl,pull-up = <0>;
 				};
+
+				spi2_pins_a: spi2@0 {
+					reg = <0>;
+					fsl,pinmux-ids = <
+						0x2100 /* MX28_PAD_SSP2_SCK__SSP2_SCK */
+						0x2110 /* MX28_PAD_SSP2_MOSI__SSP2_CMD */
+						0x2120 /* MX28_PAD_SSP2_MISO__SSP2_D0 */
+						0x2130 /* MX28_PAD_SSP2_SS0__SSP2_D3 */
+					>;
+					fsl,drive-strength = <1>;
+					fsl,voltage = <1>;
+					fsl,pull-up = <1>;
+				};
 			};
 
 			digctl@8001c000 {