rk3399: add a empty "sys_proto.h" header file
driver/usb/dwc3/gadget.c need a "sys_proto.h" header file, add a
empty one to make compile success.
Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
Acked-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/arm/include/asm/arch-rockchip/sys_proto.h b/arch/arm/include/asm/arch-rockchip/sys_proto.h
new file mode 100644
index 0000000..35423e1
--- /dev/null
+++ b/arch/arm/include/asm/arch-rockchip/sys_proto.h
@@ -0,0 +1,10 @@
+/*
+ * (C) Copyright 2016 Rockchip Electronics Co.,Ltd
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#ifndef _ASM_ARCH_SYS_PROTO_H
+#define _ASM_ARCH_SYS_PROTO_H
+
+#endif /* _ASM_ARCH_SYS_PROTO_H */