[SCSI] qla2xxx: Add host attributes.

Export additional host information via the shost_attrs member in
the scsi_host template.  Attributes include: driver version,
firmware version, ISP serial number, ISP type, ISP product ID,
HBA model name, HBA model description, PCI interconnect
information, and HBA port state.

Signed-off-by: Andrew Vasquez <andrew.vasquez@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>