NSM: Use sockaddr_storage for sm_addr field

To store larger addresses in the nsm_handle structure, make sm_addr a
sockaddr_storage.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
diff --git a/fs/lockd/mon.c b/fs/lockd/mon.c
index e4d5635..4e7e958 100644
--- a/fs/lockd/mon.c
+++ b/fs/lockd/mon.c
@@ -51,7 +51,7 @@
 
 	memset(&args, 0, sizeof(args));
 	args.mon_name = nsm->sm_name;
-	args.addr = nsm->sm_addr.sin_addr.s_addr;
+	args.addr = nsm_addr_in(nsm)->sin_addr.s_addr;
 	args.prog = NLM_PROGRAM;
 	args.vers = 3;
 	args.proc = NLMPROC_NSM_NOTIFY;