MIPS: add BMIPS Comtrend AR-5315u board

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
Reviewed-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
diff --git a/board/comtrend/ar5315u/Kconfig b/board/comtrend/ar5315u/Kconfig
new file mode 100644
index 0000000..4baae40
--- /dev/null
+++ b/board/comtrend/ar5315u/Kconfig
@@ -0,0 +1,12 @@
+if BOARD_COMTREND_AR5315U
+
+config SYS_BOARD
+	default "ar5315u"
+
+config SYS_VENDOR
+	default "comtrend"
+
+config SYS_CONFIG_NAME
+	default "comtrend_ar5315u"
+
+endif