fd7daa727126 breaks buildkernel when KERN_TLS is not defined

[Gary Jennejohn]

Commit fd7daa727126 to /usr/src/sys/netinet/tcp_usrreq.c breaks buildkernel
when KERN_TLS is not defined.

This patch fixes it for me:

--- tcp_usrreq.c.orig   2022-02-09 10:25:46.851034000 +0000
+++ tcp_usrreq.c        2022-02-09 10:30:27.541058000 +0000
@@ -2119,12 +2119,12 @@
 int
 tcp_default_ctloutput(struct inpcb *inp, struct sockopt *sopt)
 {
-       struct socket *so = inp->inp_socket;
        struct tcpcb *tp = intotcpcb(inp);
        int     error, opt, optval;
        u_int   ui;
        struct  tcp_info ti;
 #ifdef KERN_TLS
+       struct socket *so = inp->inp_socket;
        struct tls_enable tls;
 #endif
        char    *pbuf, buf[TCP_LOG_ID_LEN];
@@ -2136,7 +2136,9 @@
        INP_WLOCK_ASSERT(inp);
        KASSERT((inp->inp_flags & (INP_TIMEWAIT | INP_DROPPED)) == 0,
            ("inp_flags == %x", inp->inp_flags));
+#ifdef KERN_TLS
        KASSERT(so != NULL, ("inp_socket == NULL"));
+#endif
 
        switch (sopt->sopt_level) {
 #ifdef INET6

-- 
Gary Jennejohn