ANDROID: GKI: Add batman-adv symbols for unisoc

10 function symbol(s) added
  'bool br_multicast_has_querier_adjacent(struct net_device*, int)'
  'bool br_multicast_has_querier_anywhere(struct net_device*, int)'
  'bool br_multicast_has_router_adjacent(struct net_device*, int)'
  'int br_multicast_list_adjacent(struct net_device*, struct list_head*)'
  'int dev_get_iflink(const struct net_device*)'
  'int ip_mc_check_igmp(struct sk_buff*)'
  'int ipv6_mc_check_mld(struct sk_buff*)'
  'struct net_device* netdev_master_upper_dev_get_rcu(struct net_device*)'
  'void skb_prepare_seq_read(struct sk_buff*, unsigned int, unsigned int, struct skb_seq_state*)'
  'unsigned int skb_seq_read(unsigned int, const u8**, struct skb_seq_state*)'

Bug: 436963046
Change-Id: I03df41c2b0343be14c7de555dd6496c582dd2a2e
Signed-off-by: Cixi Geng <cixi.geng1@unisoc.com>