arm, mx27: add support for SDHC1 pin init

Signed-off-by: Heiko Schocher <hs@denx.de>
diff --git a/arch/arm/include/asm/arch-mx27/imx-regs.h b/arch/arm/include/asm/arch-mx27/imx-regs.h
index d36a6da..6ecddaa 100644
--- a/arch/arm/include/asm/arch-mx27/imx-regs.h
+++ b/arch/arm/include/asm/arch-mx27/imx-regs.h
@@ -37,6 +37,7 @@
 #endif /* CONFIG_FEC_MXC */
 
 #ifdef CONFIG_MXC_MMC
+extern void mx27_sd1_init_pins(void);
 extern void mx27_sd2_init_pins(void);
 #endif /* CONFIG_MXC_MMC */