tipc: cleanup function namespace

Do some cleanups of TIPC based on make namespacecheck
  1. Don't export unused symbols
  2. Eliminate dead code
  3. Make functions and variables local
  4. Rename buf_acquire to tipc_buf_acquire since it is used in several files

Compile tested only.
This make break out of tree kernel modules that depend on TIPC routines.

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Acked-by: Jon Maloy <jon.maloy@ericsson.com>
Acked-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/tipc/name_distr.c b/net/tipc/name_distr.c
index 6ac3c54..7b90717 100644
--- a/net/tipc/name_distr.c
+++ b/net/tipc/name_distr.c
@@ -98,7 +98,7 @@
 
 static struct sk_buff *named_prepare_buf(u32 type, u32 size, u32 dest)
 {
-	struct sk_buff *buf = buf_acquire(LONG_H_SIZE + size);
+	struct sk_buff *buf = tipc_buf_acquire(LONG_H_SIZE + size);
 	struct tipc_msg *msg;
 
 	if (buf != NULL) {