arm: ls102xa: Add basic support for LS1021ATWR board

LS102xA is an ARMv7 implementation. This patch is to add
basic support for LS1021ATWR board.
 One DDR controller
 DUART1 is used as the console

For the detail board information, please refer to README.

Signed-off-by: Chen Lu <chen.lu@freescale.com>
Signed-off-by: Yuan Yao <yao.yuan@freescale.com>
Signed-off-by: Alison Wang <alison.wang@freescale.com>
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index d7ed3e2..11143a8 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -473,6 +473,9 @@
 config TARGET_LS1021AQDS
 	bool "Support ls1021aqds_nor"
 
+config TARGET_LS1021ATWR
+	bool "Support ls1021atwr_nor"
+
 config TARGET_BALLOON3
 	bool "Support balloon3"
 
@@ -598,6 +601,7 @@
 source "board/faraday/a320evb/Kconfig"
 source "board/freescale/ls2085a/Kconfig"
 source "board/freescale/ls1021aqds/Kconfig"
+source "board/freescale/ls1021atwr/Kconfig"
 source "board/freescale/mx23evk/Kconfig"
 source "board/freescale/mx25pdk/Kconfig"
 source "board/freescale/mx28evk/Kconfig"