[SCSI] ibmvstgt: add __init/__exit macros

Add the __init and __exit macros to the module_init / module_exit
functions from drivers/scsi/ibmvscsi/ibmvstgt.c

Signed-off-by: Peter Huewe <peterhuewe@gmx.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Brian King <brking@linux.vnet.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>