FreeBSD: Catch up with recent VFS changes

cn_thread is always curthread.

https://cgit.freebsd.org/src/commit?id=b4a58fbf640409a1e507d9f7b411c83a3f83a2f3
https://cgit.freebsd.org/src/commit?id=2b68eb8e1dbbdaf6a0df1c83b26f5403ca52d4c3

Reviewed-by: Alexander Motin <mav@FreeBSD.org>
Reviewed-by: Alan Somers <asomers@gmail.com>
Signed-off-by: Ryan Moeller <freqlabs@FreeBSD.org>
Closes openzfs#12668

module/os/freebsd/zfs/zfs_file_os.c

@@ -207,7 +207,11 @@ zfs_file_getattr(zfs_file_t *fp, zfs_file_attr_t *zfattr)
 
 	td = curthread;
 
+#if __FreeBSD_version < 1400037
 	rc = fo_stat(fp, &sb, td->td_ucred, td);
+#else
+	rc = fo_stat(fp, &sb, td->td_ucred);
+#endif
 	if (rc)
 		return (SET_ERROR(rc));
 	zfattr->zfa_size = sb.st_size;

module/os/freebsd/zfs/zfs_vnops_os.c

@@ -1338,7 +1338,9 @@ zfs_lookup_internal(znode_t *dzp, const char *name, vnode_t **vpp,
 	cnp->cn_flags = ISLASTCN | SAVENAME;
 	cnp->cn_lkflags = LK_EXCLUSIVE | LK_RETRY;
 	cnp->cn_cred = kcred;
+#if __FreeBSD_version < 1400037
 	cnp->cn_thread = curthread;
+#endif
 
 	if (zfsvfs->z_use_namecache && !zfsvfs->z_replay) {
 		struct vop_lookup_args a;
@@ -4593,7 +4595,7 @@ zfs_freebsd_lookup(struct vop_lookup_args *ap, boolean_t cached)
 	strlcpy(nm, cnp->cn_nameptr, MIN(cnp->cn_namelen + 1, sizeof (nm)));
 
 	return (zfs_lookup(ap->a_dvp, nm, ap->a_vpp, cnp, cnp->cn_nameiop,
-	    cnp->cn_cred, cnp->cn_thread, 0, cached));
+	    cnp->cn_cred, curthread, 0, cached));
 }
 
 static int