NFC: nfc_sock_link() can be static

CC: Hiren Tandel <[e-mail]>
CC: Samuel Ortiz <[e-mail]>
Signed-off-by: Fengguang Wu <[e-mail]>
Signed-off-by: Samuel Ortiz <[e-mail]>

net/nfc/rawsock.c

···
 	.lock = __RW_LOCK_UNLOCKED(raw_sk_list.lock)
 };
 
-void nfc_sock_link(struct nfc_sock_list *l, struct sock *sk)
+static void nfc_sock_link(struct nfc_sock_list *l, struct sock *sk)
 {
 	write_lock(&l->lock);
 	sk_add_node(sk, &l->head);
 	write_unlock(&l->lock);
 }
 
-void nfc_sock_unlink(struct nfc_sock_list *l, struct sock *sk)
+static void nfc_sock_unlink(struct nfc_sock_list *l, struct sock *sk)
 {
 	write_lock(&l->lock);
 	sk_del_node_init(sk);