MIPS: add BMIPS Huawei HG556a board

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/board/huawei/hg556a/Makefile b/board/huawei/hg556a/Makefile
new file mode 100644
index 0000000..ace0ed3
--- /dev/null
+++ b/board/huawei/hg556a/Makefile
@@ -0,0 +1,5 @@
+#
+# SPDX-License-Identifier:	GPL-2.0+
+#
+
+obj-y += hg556a.o