sctp: fix checkpatch errors with open brace '{' and trailing statements

fix checkpatch errors below:
ERROR: that open brace { should be on the previous line
ERROR: open brace '{' following function declarations go on the next line
ERROR: trailing statements should be on next line

Signed-off-by: Wang Weidong <wangweidong1@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/sctp/protocol.c b/net/sctp/protocol.c
index 19bd4c5..34b7726 100644
--- a/net/sctp/protocol.c
+++ b/net/sctp/protocol.c
@@ -1065,8 +1065,8 @@
 #endif
 };
 
-struct sctp_pf *sctp_get_pf_specific(sa_family_t family) {
-
+struct sctp_pf *sctp_get_pf_specific(sa_family_t family)
+{
 	switch (family) {
 	case PF_INET:
 		return sctp_pf_inet_specific;