[ARM] add i.MX35 build support

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
diff --git a/arch/arm/mach-mx3/Kconfig b/arch/arm/mach-mx3/Kconfig
index 6933d2d..7c939c6 100644
--- a/arch/arm/mach-mx3/Kconfig
+++ b/arch/arm/mach-mx3/Kconfig
@@ -1,9 +1,16 @@
 if ARCH_MX3
 
+config ARCH_MX31
+	bool
+
+config ARCH_MX35
+	bool
+
 comment "MX3 platforms:"
 
 config MACH_MX31ADS
 	bool "Support MX31ADS platforms"
+	select ARCH_MX31
 	default y
 	help
 	  Include support for MX31ADS platform. This includes specific
@@ -19,13 +26,15 @@
 	  and audio module for the MX31ADS platform.
 
 config MACH_PCM037
-	bool "Support Phytec pcm037 platforms"
+	bool "Support Phytec pcm037 (i.MX31) platforms"
+	select ARCH_MX31
 	help
 	  Include support for Phytec pcm037 platform. This includes
 	  specific configurations for the board and its peripherals.
 
 config MACH_MX31LITE
 	bool "Support MX31 LITEKIT (LogicPD)"
+	select ARCH_MX31
 	default n
 	help
 	  Include support for MX31 LITEKIT platform. This includes specific
@@ -33,6 +42,7 @@
 
 config MACH_MX31_3DS
 	bool "Support MX31PDK (3DS)"
+	select ARCH_MX31
 	default n
 	help
 	  Include support for MX31PDK (3DS) platform. This includes specific
@@ -40,6 +50,7 @@
 
 config MACH_MX31MOBOARD
 	bool "Support mx31moboard platforms (EPFL Mobots group)"
+	select ARCH_MX31
 	default n
 	help
 	  Include support for mx31moboard platform. This includes specific