Revert "arm: Remove nsa310s board"

While this platform has not yet been converted, there is active efforts
to do so.  Keep the platform for now.

This reverts commit aa697e6904ba1b3144a46ec642d4695e7c0cdc3e.

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/board/zyxel/nsa310s/MAINTAINERS b/board/zyxel/nsa310s/MAINTAINERS
new file mode 100644
index 0000000..d153758
--- /dev/null
+++ b/board/zyxel/nsa310s/MAINTAINERS
@@ -0,0 +1,8 @@
+NSA310S BOARD
+M:	Gerald Kerma <dreagle@doukki.net>
+M:	Tony Dinh <mibodhi@gmail.com>
+M:	Luka Perkov <luka.perkov@sartura.hr>
+S:	Maintained
+F:	board/zyxel/nsa310s/
+F:	include/configs/nsa310s.h
+F:	configs/nsa310s_defconfig