[SCSI] pm80xx: thermal, sas controller config and error handling update

[SCSI] pm80xx: thermal, sas controller config and error handling update

Modified thermal configuration to happen after interrupt registration
Added SAS controller configuration during initialization
Added error handling logic to handle I_T_Nexus errors and variants

[jejb: fix up tabs and spaces issues]
Signed-off-by: Anand Kumar S <[email protected]>
Acked-by: Jack Wang <[email protected]>
Reviewed-by: Hannes Reinecke <[email protected]>
Signed-off-by: James Bottomley <[email protected]>