SCSI: mpt2sas: fix crash due to Watchdog is active while OS in standby mode

SCSI: mpt2sas: fix crash due to Watchdog is active while OS in standby mode

commit e4750c989f732555fca86dd73d488c79972362db upstream.

Fix oops ocurring at hibernation time.  This oops was due to the firmware fault
watchdog timer still running after we freed resources. To fix the issue we need
to terminate the watchdog timer at hibernation time.

Signed-off-by: Kashyap Desai <kashyap.desai@lsi.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>