multipath-tools: report different piority value for rdac if io-shipping is enabled
multipath-tools: report different piority value for rdac if io-shipping is enabled

This patch adds code to report different priority value if the storage is configured with io-shipping.
It sets  the bit 3 if io-shipping is enabled. This is to differentiate between different modes.

Signed-off-by: Babu Moger <fc83b762ab7666c2f8f765f26b2c5088d16d49d7@lsi.com>
Reviewed-by : Yanling Qi <yanling.qi@lsi.com>
Reviewed-by : Somasundaram Krishnasamy <Somasundaram.Krishnasamy@lsi.com>

vijaychauhan/multipath-tools,unakatsuo/multipath-tools,unakatsuo/multipath-tools,vijaychauhan/multipath-tools,unakatsuo/multipath-tools