tipc: Fix a kernel-doc warning in name_table.c

Fix kernel-doc warning:

Documentation/networking/tipc:66: /home/sfr/next/next/net/tipc/name_table.c
  :558: WARNING: Unexpected indentation.
Documentation/networking/tipc:66: /home/sfr/next/next/net/tipc/name_table.c
  :559: WARNING: Block quote ends without a blank line; unexpected unindent.

Due to blank line missing.

Fixes: 908148bc50 ("tipc: refactor tipc_sendmsg() and tipc_lookup_anycast()")
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Link: https://lore.kernel.org/netdev/20210318172255.63185609@canb.auug.org.au/
Signed-off-by: Wu XiangCheng <bobwxc@email.cn>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/tipc/name_table.c

@@ -553,7 +553,9 @@ exit:
  *
  * On entry, a non-zero 'sk->node' indicates the node where we want lookup to be
  * performed, which may not be this one.
+ *
  * On exit:
+ *
  * - If lookup is deferred to another node, leave 'sk->node' unchanged and
  *   return 'true'.
  * - If lookup is successful, set the 'sk->node' and 'sk->ref' (== portid) which