ARM: mx5: Add AUDMUX4 pinctrl data

This patch adds pinctrl data for the AUDMUX4 on MX53.
Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>

arch/arm/boot/dts/imx53.dtsi

@@ -301,6 +301,15 @@ MX53_PAD_KEY_COL1__AUDMUX_AUD5_TXFS 0x80000000
 							MX53_PAD_KEY_ROW1__AUDMUX_AUD5_RXD  0x80000000
 						>;
 					};
+
+					pinctrl_audmux_2: audmuxgrp-2 {
+						fsl,pins = <
+							MX53_PAD_SD2_DATA3__AUDMUX_AUD4_TXC	0x80000000
+							MX53_PAD_SD2_DATA2__AUDMUX_AUD4_TXD	0x80000000
+							MX53_PAD_SD2_DATA1__AUDMUX_AUD4_TXFS	0x80000000
+							MX53_PAD_SD2_DATA0__AUDMUX_AUD4_RXD	0x80000000
+						>;
+					};
 				};
 
 				fec {