i.MX27: Add ADS platform support

This patch adds basic support for the Freescale MX27ADS reference board.
Currently only a serial console can be used.

Signed-off-by: Juergen Beisert <j.beisert@pengutronix.de>

diff --git a/arch/arm/mach-mx2/Kconfig b/arch/arm/mach-mx2/Kconfig
index 6e7d724..6f98355 100644
--- a/arch/arm/mach-mx2/Kconfig
+++ b/arch/arm/mach-mx2/Kconfig
@@ -9,3 +9,10 @@
 
 comment "MX2 Platforms"
 	depends on ARCH_MX2
+
+config MACH_MX27ADS
+	bool "MX27ADS platform"
+	depends on MACH_MX27
+	help
+	  Include support for MX27ADS platform. This includes specific
+	  configurations for the board and its peripherals.