mptcp: Make mptcp_pm_nl_mp_prio_send_ack() static

This function is only used within pm_netlink.c now.

Fixes: 06706542 ("mptcp: add the outgoing MP_PRIO support")
Reviewed-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/mptcp/pm_netlink.c

@@ -654,7 +654,7 @@ void mptcp_pm_nl_addr_send_ack(struct mptcp_sock *msk)
 	}
 }
 
-int mptcp_pm_nl_mp_prio_send_ack(struct mptcp_sock *msk,
+static int mptcp_pm_nl_mp_prio_send_ack(struct mptcp_sock *msk,
 					struct mptcp_addr_info *addr,
 					u8 bkup)
 {

net/mptcp/protocol.h

@@ -736,9 +736,6 @@ void mptcp_pm_nl_addr_send_ack(struct mptcp_sock *msk);
 void mptcp_pm_rm_addr_received(struct mptcp_sock *msk,
 			       const struct mptcp_rm_list *rm_list);
 void mptcp_pm_mp_prio_received(struct sock *sk, u8 bkup);
-int mptcp_pm_nl_mp_prio_send_ack(struct mptcp_sock *msk,
-				 struct mptcp_addr_info *addr,
-				 u8 bkup);
 void mptcp_pm_mp_fail_received(struct sock *sk, u64 fail_seq);
 void mptcp_pm_free_anno_list(struct mptcp_sock *msk);
 bool mptcp_pm_sport_in_anno_list(struct mptcp_sock *msk, const struct sock *sk);