multipath-tools: service mode changes for RDAC storage

multipath-tools: service mode changes for RDAC storage

This patch was not picked up yet, so resubmitting it again. There no change except it was generated on top of the latest file.

This patch handles the recent changes in NetApp RDAC storage firmware to report service mode. Firmware changed the inquiry page 0xc9 to report service mode. Purpose this change is to avoid DMMP going into infinite loop of switching back and forth between controllers when a controller is placed in service mode. This fixes the problem and reports the path as failed if the controller is placed in service mode.

Signed-off-by: Babu Moger <babu.moger@netapp.com>
Reviewed-by: Yanling Qi <yanling.qi@netapp.com>
Reviewed-by: Somasundaram Krishnasamy <Somasundaram.Krishnasamy@netapp.com>