imx: mx6 move TARGET_xx Kconfig option to mx6 specific Kconfig file

Move TARGET_xx Kconfig option based on mx6 to arch/arm/cpu/armv7/mx6/Kconfig.
Add enable "CONFIG_ARCH_MX6" for boards based on mx6.
Then we can choose target boards using "make ARCH=arm menuconfig"
with ARCH_MX6 defined.

If using original way, we have no chance to enable ARCH_MX6 when
"make menuconfig". Even define CONFIG_ARCH_MX6=y in xx_defconfig,
kconfig will complains "arch/../configs/platinum_titanium_defconfig:3:
warning: override: TARGET_PLATINUM_TITANIUM changes choice state"

Signed-off-by: Peng Fan <Peng.Fan@freescale.com>
Cc: Stefano Babic <sbabic@denx.de>
Cc: Heiko Schocher <hs@denx.de>
Cc: Tim Harvey <tharvey@gateworks.com>
Cc: Eric BĂ©nard <eric@eukrea.com>
Cc: Fabio Estevam <fabio.estevam@freescale.com>
Cc: Eric Nelson <eric.nelson@boundarydevices.com>
Cc: Marek Vasut <marex@denx.de>
Cc: Christian Gmeiner <christian.gmeiner@gmail.com>
Cc: Stefan Roese <sr@denx.de>
Cc: Soeren Moch <smoch@web.de>
Cc: Otavio Salvador <otavio@ossystems.com.br>
Acked-by: Stefano Babic <sbabic@denx.de>
Acked-by: Soeren Moch <smoch@web.de>
Acked-by: Otavio Salvador <otavio@ossystems.com.br>
Acked-by: Christian Gmeiner <christian.gmeiner@gmail.com>
diff --git a/arch/arm/cpu/armv7/mx6/Kconfig b/arch/arm/cpu/armv7/mx6/Kconfig
index dce7ffc..c43cea8 100644
--- a/arch/arm/cpu/armv7/mx6/Kconfig
+++ b/arch/arm/cpu/armv7/mx6/Kconfig
@@ -33,25 +33,153 @@
 	prompt "MX6 board select"
 	optional
 
+config TARGET_ARISTAINETOS
+	bool "aristainetos"
+	select CPU_V7
+
+config TARGET_ARISTAINETOS2
+	bool "aristainetos2"
+	select CPU_V7
+
+config TARGET_CGTQMX6EVAL
+	bool "cgtqmx6eval"
+	select CPU_V7
+
 config TARGET_CM_FX6
-	bool "Support CM-FX6"
+	bool "CM-FX6"
 	select SUPPORT_SPL
 	select DM
 	select DM_SERIAL
 	select DM_GPIO
 
+config TARGET_EMBESTMX6BOARDS
+	bool "embestmx6boards"
+	select CPU_V7
+
+config TARGET_GW_VENTANA
+	bool "gw_ventana"
+	select CPU_V7
+	select SUPPORT_SPL
+
+config TARGET_KOSAGI_NOVENA
+	bool "Kosagi Novena"
+	select CPU_V7
+	select SUPPORT_SPL
+
+config TARGET_MX6CUBOXI
+	bool "Solid-run mx6 boards"
+	select CPU_V7
+	select SUPPORT_SPL
+
+config TARGET_MX6QARM2
+	bool "mx6qarm2"
+	select CPU_V7
+
+config TARGET_MX6QSABREAUTO
+	bool "mx6qsabreauto"
+	select CPU_V7
+	select DM
+	select DM_THERMAL
+
+config TARGET_MX6SABRESD
+	bool "mx6sabresd"
+	select CPU_V7
+	select SUPPORT_SPL
+	select DM
+	select DM_THERMAL
+
+config TARGET_MX6SLEVK
+	bool "mx6slevk"
+	select CPU_V7
+
+config TARGET_MX6SXSABRESD
+	bool "mx6sxsabresd"
+	select CPU_V7
+	select SUPPORT_SPL
+	select DM
+	select DM_THERMAL
+
+config TARGET_MX6UL_14X14_EVK
+	bool "mx6ul_14x14_evk"
+	select CPU_V7
+	select DM
+	select DM_THERMAL
+	select SUPPORT_SPL
+
+config TARGET_NITROGEN6X
+	bool "nitrogen6x"
+	select CPU_V7
+
+config TARGET_OT1200
+	bool "Bachmann OT1200"
+	select CPU_V7
+	select SUPPORT_SPL
+
+config TARGET_PLATINUM_PICON
+	bool "platinum-picon"
+	select CPU_V7
+	select SUPPORT_SPL
+
+config TARGET_PLATINUM_TITANIUM
+	bool "platinum-titanium"
+	select CPU_V7
+	select SUPPORT_SPL
+
 config TARGET_SECOMX6
-	bool "Support secomx6 boards"
+	bool "secomx6 boards"
+
+config TARGET_TBS2910
+	bool "tbs2910"
+	select CPU_V7
+
+config TARGET_TITANIUM
+	bool "titanium"
+	select CPU_V7
 
 config TARGET_TQMA6
 	bool "TQ Systems TQMa6 board"
 
+config TARGET_UDOO
+	bool "udoo"
+	select CPU_V7
+	select SUPPORT_SPL
+
+config TARGET_WANDBOARD
+	bool "wandboard"
+	select CPU_V7
+	select SUPPORT_SPL
+
+config TARGET_WARP
+	bool "WaRP"
+	select CPU_V7
+
 endchoice
 
 config SYS_SOC
 	default "mx6"
 
+source "board/aristainetos/Kconfig"
+source "board/bachmann/ot1200/Kconfig"
+source "board/barco/platinum/Kconfig"
+source "board/barco/titanium/Kconfig"
+source "board/boundary/nitrogen6x/Kconfig"
+source "board/compulab/cm_fx6/Kconfig"
+source "board/congatec/cgtqmx6eval/Kconfig"
+source "board/embest/mx6boards/Kconfig"
+source "board/freescale/mx6qarm2/Kconfig"
+source "board/freescale/mx6qsabreauto/Kconfig"
+source "board/freescale/mx6sabresd/Kconfig"
+source "board/freescale/mx6slevk/Kconfig"
+source "board/freescale/mx6sxsabresd/Kconfig"
+source "board/freescale/mx6ul_14x14_evk/Kconfig"
+source "board/gateworks/gw_ventana/Kconfig"
+source "board/kosagi/novena/Kconfig"
 source "board/seco/Kconfig"
+source "board/solidrun/mx6cuboxi/Kconfig"
+source "board/tbs/tbs2910/Kconfig"
 source "board/tqc/tqma6/Kconfig"
+source "board/udoo/Kconfig"
+source "board/wandboard/Kconfig"
+source "board/warp/Kconfig"
 
 endif