scsi: ips: Change the return type of ips_release() into 'void'

ips_release() has one caller and that caller ignores the value returned by
ips_release(). Hence change the return type of that function into 'void'.

Link: https://lore.kernel.org/r/20220218195117.25689-3-bvanassche@acm.org


Cc: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Cc: John Garry <john.garry@huawei.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>