staging: rtl8188eu: Remove unused members of struct adapter

	struct mutex hw_init_mutex;

	spinlock_t br_ext_lock;

	struct nat25_network_db_entry	*nethash[NAT25_HASH_SIZE];

	unsigned char			pppoe_addr[MACADDRLEN];

	unsigned char			scdb_mac[MACADDRLEN];

	unsigned char			scdb_ip[4];

	struct nat25_network_db_entry	*scdb_entry;

	unsigned char			br_mac[MACADDRLEN];

	unsigned char			br_ip[4];

	struct br_ext_info		ethBrExtInfo;

	u8	fix_rate;