[PATCH] ocfs2/cluster/tcp.c: make some functions static

Commit 0f475b2a (ocfs2/net: Silence build
warnings) made sense as far as it fixed compile warnings, but it was not
required that it made the functions global.

Signed-off-by: Adrian Bunk <bunk@kernel.org>
Signed-off-by: Mark Fasheh <mfasheh@suse.com>