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/Kconfig b/board/sfr/nb4_ser/Kconfig
new file mode 100644
index 0000000..78aefb5
--- /dev/null
+++ b/board/sfr/nb4_ser/Kconfig
@@ -0,0 +1,12 @@
+if BOARD_SFR_NB4_SER
+
+config SYS_BOARD
+	default "nb4_ser"
+
+config SYS_VENDOR
+	default "sfr"
+
+config SYS_CONFIG_NAME
+	default "sfr_nb4_ser"
+
+endif