In the sysfs scsi host reference counting merge the call to a legacy hosts
release function was removed.

This patch adds the call back in.

This patch was tested with insmod / rmmod on LLDDs using the legacy interface
and LLDDs using the new interface:

Legacy Interface:
qla2xxx-v8.00.00b1
qlogicisp
aic7xxx_old (Does not call scsi_unregister in release, but unloaded)

New Interface:
scsi_debug
aic7xxx (Many illegal context warnings caused by mid vs LLDD primitive
         mixing, but appears to unload clean).

 drivers/scsi/hosts.c |    4 ++++
 1 files changed, 4 insertions(+)