scsi host / scsi target state model update

This patch sequence converts the SCSI host state model to a model like
SCSI device is using and adds a state model for SCSI targets. These new
state models are then used to help in the removal of targets and devices
during removal of a SCSI host.

I have done some simple add and delete testing. The target state model
should have more of the targets states covered. The
list_for_each_entry_safe in __scsi_remove_target needs to be cleaned up.

For background context please refer to previous mail.

http://marc.theaimsgroup.com/?t=111878458800003&r=1&...

http://marc.theaimsgroup.com/?t=111833447800002&r=1&...


-andmike
--
Michael Anderson
andmike@us.ibm.com

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