i.MX2 family: Add basic mach support

This patch adds basic mach support for the mx2 processor family, based
on the original freescale code and adapted to mainline kernel coding
style.

This part adds the global build only.

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

diff --git a/arch/arm/plat-mxc/Kconfig b/arch/arm/plat-mxc/Kconfig
index bb6e127..e14eaad 100644
--- a/arch/arm/plat-mxc/Kconfig
+++ b/arch/arm/plat-mxc/Kconfig
@@ -3,9 +3,14 @@
 menu "Freescale MXC Implementations"
 
 choice
-	prompt "MXC/iMX System Type"
+	prompt "MXC/iMX Base Type"
 	default ARCH_MX3
 
+config ARCH_MX2
+	bool "MX2-based"
+	help
+	  This enables support for systems based on the Freescale i.MX2 family
+
 config ARCH_MX3
 	bool "MX3-based"
 	help
@@ -13,6 +18,7 @@
 
 endchoice
 
+source "arch/arm/mach-mx2/Kconfig"
 source "arch/arm/mach-mx3/Kconfig"
 
 endmenu