armv7: Add support of ls1021a-iot board

The patch adds support for Freescale ls1021a-iot board.

Signed-off-by: Feng Li <feng.li_2@nxp.com>
[YS: rewrite commit message, fix whitespace in Kconfig]
Reviewed-by: York Sun <york.sun@nxp.com>
diff --git a/board/freescale/ls1021aiot/Kconfig b/board/freescale/ls1021aiot/Kconfig
new file mode 100644
index 0000000..4a12c16
--- /dev/null
+++ b/board/freescale/ls1021aiot/Kconfig
@@ -0,0 +1,15 @@
+if TARGET_LS1021AIOT
+
+config SYS_BOARD
+	default "ls1021aiot"
+
+config SYS_VENDOR
+	default "freescale"
+
+config SYS_SOC
+	default "ls102xa"
+
+config SYS_CONFIG_NAME
+	default "ls1021aiot"
+
+endif