ARM: imx: move iomux drivers and headers into mach-imx

The board files in mach-imx are the only users of iomux drivers and
headers.  Move them into mach-imx from plat-mxc.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Acked-by: Sascha Hauer <s.hauer@pengutronix.de>
Acked-by: Arnd Bergmann <arnd@arndb.de>
diff --git a/arch/arm/mach-imx/Kconfig b/arch/arm/mach-imx/Kconfig
index 8d27658..f10282c 100644
--- a/arch/arm/mach-imx/Kconfig
+++ b/arch/arm/mach-imx/Kconfig
@@ -7,6 +7,12 @@
 config HAVE_IMX_SRC
 	bool
 
+config IMX_HAVE_IOMUX_V1
+	bool
+
+config ARCH_MXC_IOMUX_V3
+	bool
+
 config ARCH_MX1
 	bool