mips: bmips: add NeufBox 4 (Sercomm) board

This serves as an example for bcm6358-leds.

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/board/sfr/nb4_ser/Makefile b/board/sfr/nb4_ser/Makefile
new file mode 100644
index 0000000..f3b1404
--- /dev/null
+++ b/board/sfr/nb4_ser/Makefile
@@ -0,0 +1,5 @@
+#
+# SPDX-License-Identifier:	GPL-2.0+
+#
+
+obj-y += nb4-ser.o