ARM: i.MX: remove unused ARCH_* configs

This removes the unused Kconfig options ARCH_MX5, ARCH_MX51,
ARCH_MX53 and MACH_MX21.

Signed-off-by: Paul Bolle <pebolle@tiscali.nl>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>

arch/arm/mach-imx/Kconfig

@@ -83,24 +83,12 @@ config ARCH_MXC_IOMUX_V3
 config ARCH_MX1
 	bool
 
-config MACH_MX21
-	bool
-
 config ARCH_MX25
 	bool
 
 config MACH_MX27
 	bool
 
-config ARCH_MX5
-	bool
-
-config ARCH_MX51
-	bool
-
-config ARCH_MX53
-	bool
-
 config SOC_IMX1
 	bool
 	select ARCH_MX1
@@ -114,7 +102,6 @@ config SOC_IMX21
 	select COMMON_CLK
 	select CPU_ARM926T
 	select IMX_HAVE_IOMUX_V1
-	select MACH_MX21
 	select MXC_AVIC
 
 config SOC_IMX25
@@ -155,7 +142,6 @@ config SOC_IMX35
 config SOC_IMX5
 	bool
 	select ARCH_HAS_CPUFREQ
-	select ARCH_MX5
 	select ARCH_MXC_IOMUX_V3
 	select COMMON_CLK
 	select CPU_V7
@@ -163,8 +149,6 @@ config SOC_IMX5
 
 config	SOC_IMX51
 	bool
-	select ARCH_MX5
-	select ARCH_MX51
 	select PINCTRL
 	select PINCTRL_IMX51
 	select SOC_IMX5
@@ -789,8 +773,6 @@ comment "Device tree only"
 
 config	SOC_IMX53
 	bool "i.MX53 support"
-	select ARCH_MX5
-	select ARCH_MX53
 	select HAVE_CAN_FLEXCAN if CAN
 	select IMX_HAVE_PLATFORM_IMX2_WDT
 	select PINCTRL