Fix vendor prefix value

src/common.h

@@ -13,7 +13,6 @@
 #define __DMLAYER_H__
 
 #include "libbbfdm-api/dmcommon.h"
-#define STR(s) #s
 
 void gre___get_tunnel_system_name(struct uci_section *iface_section, char *device_str, size_t device_str_size);