tcm_fc: init/exit functions should not be protected by "#ifdef MODULE"

There's no need for the #ifdef protection when building into the kernel,
and in fact we need the module_init() for the initialization function to
be called.

Signed-off-by: Roland Dreier <roland@purestorage.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>