MXC: Add a digital audio multiplexer driver

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
diff --git a/arch/arm/mach-mx2/Kconfig b/arch/arm/mach-mx2/Kconfig
index c8a2eac..3e14da3 100644
--- a/arch/arm/mach-mx2/Kconfig
+++ b/arch/arm/mach-mx2/Kconfig
@@ -6,11 +6,13 @@
 
 config MACH_MX21
 	bool "i.MX21 support"
+	select ARCH_MXC_AUDMUX_V1
 	help
 	  This enables support for Freescale's MX2 based i.MX21 processor.
 
 config MACH_MX27
 	bool "i.MX27 support"
+	select ARCH_MXC_AUDMUX_V1
 	help
 	  This enables support for Freescale's MX2 based i.MX27 processor.