[SCSI] scsi_dh: create sysfs file, dh_state for all SCSI disk devices

Create the sysfs file, dh_state even if the new SCSI device is not
in the any of the device handler's internal lists.

Signed-Off-by: Chandra Seetharaman <sekharan@us.ibm.com>
Acked-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>