mx6: remove SYS_SOC from board Kconfig

Remove duplicated SYS_SOC Kconfig entry from board Kconfig,
because we have this entry in arch/arm/cpu/armv7/mx6/Kconfig.

Signed-off-by: Peng Fan <Peng.Fan@freescale.com>
Cc: Stefano Babic <sbabic@denx.de>
Cc: Heiko Schocher <hs@denx.de>
Cc: Christian Gmeiner <christian.gmeiner@gmail.com>
Cc: Stefan Roese <sr@denx.de>
Cc: Troy Kisky <troy.kisky@boundarydevices.com>
Cc: Nikita Kiryanov <nikita@compulab.co.il>
Cc: "Eric BĂ©nard" <eric@eukrea.com>
Cc: Fabio Estevam <fabio.estevam@freescale.com>
Cc: Tim Harvey <tharvey@gateworks.com>
Cc: Marek Vasut <marex@denx.de>
Cc: Markus Niebel <Markus.Niebel@tq-group.com>
Cc: Otavio Salvador <otavio@ossystems.com.br>
Acked-by: Stefan Roese <sr@denx.de>
Acked-by: Marek Vasut <marex@denx.de>
Acked-by: Christian Gmeiner <christian.gmeiner@gmail.com>
Acked-by: Markus Niebel <Markus.Niebel@tq-group.com>
Acked-by: Troy Kisky <troy.kisky@boundarydevices.com>
Acked-by: Igor Grinberg <grinberg@compulab.co.il>
diff --git a/board/aristainetos/Kconfig b/board/aristainetos/Kconfig
index e987f38..e416c9a 100644
--- a/board/aristainetos/Kconfig
+++ b/board/aristainetos/Kconfig
@@ -3,9 +3,6 @@
 config SYS_BOARD
 	default "aristainetos"
 
-config SYS_SOC
-	default "mx6"
-
 config SYS_CONFIG_NAME
 	default "aristainetos"
 
@@ -16,9 +13,6 @@
 config SYS_BOARD
 	default "aristainetos"
 
-config SYS_SOC
-	default "mx6"
-
 config SYS_CONFIG_NAME
 	default "aristainetos2"
 
@@ -29,9 +23,6 @@
 config SYS_BOARD
 	default "aristainetos"
 
-config SYS_SOC
-	default "mx6"
-
 config SYS_CONFIG_NAME
 	default "aristainetos2b"
 
diff --git a/board/bachmann/ot1200/Kconfig b/board/bachmann/ot1200/Kconfig
index 7f8a6a1..4ccb60a 100644
--- a/board/bachmann/ot1200/Kconfig
+++ b/board/bachmann/ot1200/Kconfig
@@ -6,9 +6,6 @@
 config SYS_VENDOR
 	default "bachmann"
 
-config SYS_SOC
-	default "mx6"
-
 config SYS_CONFIG_NAME
 	default "ot1200"
 
diff --git a/board/barco/platinum/Kconfig b/board/barco/platinum/Kconfig
index 8bbad24..cc0648c 100644
--- a/board/barco/platinum/Kconfig
+++ b/board/barco/platinum/Kconfig
@@ -6,9 +6,6 @@
 config SYS_VENDOR
 	default "barco"
 
-config SYS_SOC
-	default "mx6"
-
 config SYS_BOARD
 	default "platinum"
 
@@ -25,9 +22,6 @@
 config SYS_VENDOR
 	default "barco"
 
-config SYS_SOC
-	default "mx6"
-
 config SYS_BOARD
 	default "platinum"
 
diff --git a/board/barco/titanium/Kconfig b/board/barco/titanium/Kconfig
index b6f7c85..21bc36e 100644
--- a/board/barco/titanium/Kconfig
+++ b/board/barco/titanium/Kconfig
@@ -6,9 +6,6 @@
 config SYS_VENDOR
 	default "barco"
 
-config SYS_SOC
-	default "mx6"
-
 config SYS_CONFIG_NAME
 	default "titanium"
 
diff --git a/board/boundary/nitrogen6x/Kconfig b/board/boundary/nitrogen6x/Kconfig
index 03b0f6f..f4db56d 100644
--- a/board/boundary/nitrogen6x/Kconfig
+++ b/board/boundary/nitrogen6x/Kconfig
@@ -6,9 +6,6 @@
 config SYS_VENDOR
 	default "boundary"
 
-config SYS_SOC
-	default "mx6"
-
 config SYS_CONFIG_NAME
 	default "nitrogen6x"
 
diff --git a/board/compulab/cm_fx6/Kconfig b/board/compulab/cm_fx6/Kconfig
index 508c21f..59070c5 100644
--- a/board/compulab/cm_fx6/Kconfig
+++ b/board/compulab/cm_fx6/Kconfig
@@ -6,9 +6,6 @@
 config SYS_VENDOR
 	default "compulab"
 
-config SYS_SOC
-	default "mx6"
-
 config SYS_CONFIG_NAME
 	default "cm_fx6"
 
diff --git a/board/congatec/cgtqmx6eval/Kconfig b/board/congatec/cgtqmx6eval/Kconfig
index 0a837bd..773551b 100644
--- a/board/congatec/cgtqmx6eval/Kconfig
+++ b/board/congatec/cgtqmx6eval/Kconfig
@@ -6,9 +6,6 @@
 config SYS_VENDOR
 	default "congatec"
 
-config SYS_SOC
-	default "mx6"
-
 config SYS_CONFIG_NAME
 	default "cgtqmx6eval"
 
diff --git a/board/embest/mx6boards/Kconfig b/board/embest/mx6boards/Kconfig
index 53a39d3..24d01f2 100644
--- a/board/embest/mx6boards/Kconfig
+++ b/board/embest/mx6boards/Kconfig
@@ -6,9 +6,6 @@
 config SYS_VENDOR
 	default "embest"
 
-config SYS_SOC
-	default "mx6"
-
 config SYS_CONFIG_NAME
 	default "embestmx6boards"
 
diff --git a/board/freescale/mx6qarm2/Kconfig b/board/freescale/mx6qarm2/Kconfig
index 4af33af..8ab8b46 100644
--- a/board/freescale/mx6qarm2/Kconfig
+++ b/board/freescale/mx6qarm2/Kconfig
@@ -6,9 +6,6 @@
 config SYS_VENDOR
 	default "freescale"
 
-config SYS_SOC
-	default "mx6"
-
 config SYS_CONFIG_NAME
 	default "mx6qarm2"
 
diff --git a/board/freescale/mx6qsabreauto/Kconfig b/board/freescale/mx6qsabreauto/Kconfig
index cc2a140..e579c0f 100644
--- a/board/freescale/mx6qsabreauto/Kconfig
+++ b/board/freescale/mx6qsabreauto/Kconfig
@@ -6,9 +6,6 @@
 config SYS_VENDOR
 	default "freescale"
 
-config SYS_SOC
-	default "mx6"
-
 config SYS_CONFIG_NAME
 	default "mx6qsabreauto"
 
diff --git a/board/freescale/mx6sabresd/Kconfig b/board/freescale/mx6sabresd/Kconfig
index fa6ddb2..e87dea0 100644
--- a/board/freescale/mx6sabresd/Kconfig
+++ b/board/freescale/mx6sabresd/Kconfig
@@ -6,9 +6,6 @@
 config SYS_VENDOR
 	default "freescale"
 
-config SYS_SOC
-	default "mx6"
-
 config SYS_CONFIG_NAME
 	default "mx6sabresd"
 
diff --git a/board/freescale/mx6slevk/Kconfig b/board/freescale/mx6slevk/Kconfig
index d32da90..18482b5 100644
--- a/board/freescale/mx6slevk/Kconfig
+++ b/board/freescale/mx6slevk/Kconfig
@@ -6,9 +6,6 @@
 config SYS_VENDOR
 	default "freescale"
 
-config SYS_SOC
-	default "mx6"
-
 config SYS_CONFIG_NAME
 	default "mx6slevk"
 
diff --git a/board/freescale/mx6sxsabresd/Kconfig b/board/freescale/mx6sxsabresd/Kconfig
index 940983e..fcfac0a 100644
--- a/board/freescale/mx6sxsabresd/Kconfig
+++ b/board/freescale/mx6sxsabresd/Kconfig
@@ -6,9 +6,6 @@
 config SYS_VENDOR
 	default "freescale"
 
-config SYS_SOC
-	default "mx6"
-
 config SYS_CONFIG_NAME
 	default "mx6sxsabresd"
 
diff --git a/board/freescale/mx6ul_14x14_evk/Kconfig b/board/freescale/mx6ul_14x14_evk/Kconfig
index eda02c9..8210cd3 100644
--- a/board/freescale/mx6ul_14x14_evk/Kconfig
+++ b/board/freescale/mx6ul_14x14_evk/Kconfig
@@ -6,9 +6,6 @@
 config SYS_VENDOR
 	default "freescale"
 
-config SYS_SOC
-	default "mx6"
-
 config SYS_CONFIG_NAME
 	default "mx6ul_14x14_evk"
 
diff --git a/board/gateworks/gw_ventana/Kconfig b/board/gateworks/gw_ventana/Kconfig
index c233e90..ccce98e 100644
--- a/board/gateworks/gw_ventana/Kconfig
+++ b/board/gateworks/gw_ventana/Kconfig
@@ -6,9 +6,6 @@
 config SYS_VENDOR
 	default "gateworks"
 
-config SYS_SOC
-	default "mx6"
-
 config SYS_CONFIG_NAME
 	default "gw_ventana"
 
diff --git a/board/kosagi/novena/Kconfig b/board/kosagi/novena/Kconfig
index 94f1754..c5cbaab 100644
--- a/board/kosagi/novena/Kconfig
+++ b/board/kosagi/novena/Kconfig
@@ -6,9 +6,6 @@
 config SYS_VENDOR
 	default "kosagi"
 
-config SYS_SOC
-	default "mx6"
-
 config SYS_CONFIG_NAME
 	default "novena"
 
diff --git a/board/solidrun/mx6cuboxi/Kconfig b/board/solidrun/mx6cuboxi/Kconfig
index 31d88b2..741c175 100644
--- a/board/solidrun/mx6cuboxi/Kconfig
+++ b/board/solidrun/mx6cuboxi/Kconfig
@@ -6,9 +6,6 @@
 config SYS_VENDOR
 	default "solidrun"
 
-config SYS_SOC
-	default "mx6"
-
 config SYS_CONFIG_NAME
 	default "mx6cuboxi"
 
diff --git a/board/tqc/tqma6/Kconfig b/board/tqc/tqma6/Kconfig
index dbd8787..5dafa38 100644
--- a/board/tqc/tqma6/Kconfig
+++ b/board/tqc/tqma6/Kconfig
@@ -6,9 +6,6 @@
 config SYS_VENDOR
 	default "tqc"
 
-config SYS_SOC
-	default "mx6"
-
 config SYS_CONFIG_NAME
 	default "tqma6"
 
diff --git a/board/udoo/Kconfig b/board/udoo/Kconfig
index 970f39f..78617a2 100644
--- a/board/udoo/Kconfig
+++ b/board/udoo/Kconfig
@@ -3,9 +3,6 @@
 config SYS_BOARD
 	default "udoo"
 
-config SYS_SOC
-	default "mx6"
-
 config SYS_CONFIG_NAME
 	default "udoo"
 
diff --git a/board/wandboard/Kconfig b/board/wandboard/Kconfig
index 3928566..def6369 100644
--- a/board/wandboard/Kconfig
+++ b/board/wandboard/Kconfig
@@ -3,9 +3,6 @@
 config SYS_BOARD
 	default "wandboard"
 
-config SYS_SOC
-	default "mx6"
-
 config SYS_CONFIG_NAME
 	default "wandboard"
 
diff --git a/board/warp/Kconfig b/board/warp/Kconfig
index 7b569cc..dc02636 100644
--- a/board/warp/Kconfig
+++ b/board/warp/Kconfig
@@ -3,9 +3,6 @@
 config SYS_BOARD
 	default "warp"
 
-config SYS_SOC
-	default "mx6"
-
 config SYS_CONFIG_NAME
 	default "warp"