arm/imx: merge i.MX3 and i.MX6

The patch merges the build of imx3 and imx6.  The Kconfig symbol
ARCH_IMX_V6_V7 is introduced to replace ARCH_MX3 and ARCH_MX6.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
diff --git a/arch/arm/mach-imx/Kconfig b/arch/arm/mach-imx/Kconfig
index 66b8648..b1f782f 100644
--- a/arch/arm/mach-imx/Kconfig
+++ b/arch/arm/mach-imx/Kconfig
@@ -74,6 +74,7 @@
 	select ARCH_MXC_AUDMUX_V2
 	select ARCH_MX31
 	select MXC_AVIC
+	select SMP_ON_UP if SMP
 
 config SOC_IMX35
 	bool
@@ -83,6 +84,7 @@
 	select HAVE_EPIT
 	select ARCH_MX35
 	select MXC_AVIC
+	select SMP_ON_UP if SMP
 
 
 if ARCH_IMX_V4_V5
@@ -351,7 +353,7 @@
 
 endif
 
-if ARCH_MX3
+if ARCH_IMX_V6_V7
 
 comment "MX31 platforms:"
 
@@ -601,9 +603,6 @@
 	  Include support for VPR200 platform. This includes specific
 	  configurations for the board and its peripherals.
 
-endif
-
-if ARCH_MX6
 comment "i.MX6 family:"
 
 config SOC_IMX6Q