arm/imx: let platform files include the SoC-specific iomux header

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
diff --git a/arch/arm/mach-mx2/pcm970-baseboard.c b/arch/arm/mach-mx2/pcm970-baseboard.c
index 60d5446..4aafd5b 100644
--- a/arch/arm/mach-mx2/pcm970-baseboard.c
+++ b/arch/arm/mach-mx2/pcm970-baseboard.c
@@ -24,7 +24,7 @@
 #include <asm/mach/arch.h>
 
 #include <mach/common.h>
-#include <mach/iomux.h>
+#include <mach/iomux-mx27.h>
 #include <mach/imxfb.h>
 #include <mach/hardware.h>
 #include <mach/mmc.h>