staging: lustre: remove cfs_module() macro

Open code the module_init/module_exit lines, and also use
MODULE_VERSION, as it seems that was intended, but just never hooked up
at all.

Cc: Peng Tao <tao.peng@emc.com>
Cc: Andreas Dilger <andreas.dilger@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>