Remove memset with 0 for stor_device->stor_chns in storvsc_suspend() before
the call to kfree() as the memory contains no sensitive information.

Link: https://lore.kernel.org/r/20200605075934.8403-1-efremov@linux.com
Fixes: 56fb1058 ("scsi: storvsc: Add the support of hibernation")
Suggested-by: NDexuan Cui <decui@microsoft.com>
Reviewed-by: NDexuan Cui <decui@microsoft.com>
Signed-off-by: NDenis Efremov <efremov@linux.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>