nds32: Support AE3XX platform.

Support Andestech AE3xx platform: serial, timer device tree flow.

Signed-off-by: rick <rick@andestech.com>
diff --git a/board/AndesTech/adp-ae3xx/MAINTAINERS b/board/AndesTech/adp-ae3xx/MAINTAINERS
new file mode 100644
index 0000000..02e5a19
--- /dev/null
+++ b/board/AndesTech/adp-ae3xx/MAINTAINERS
@@ -0,0 +1,6 @@
+ADP-AG101P BOARD
+M:	Andes <uboot@andestech.com>
+S:	Maintained
+F:	board/AndesTech/adp-ae3xx/
+F:	include/configs/adp-ae3xx.h
+F:	configs/adp-ae3xx_defconfig