[SCSI] qla2xxx: Add NVRAM 'Disable Serdes' bit support.

The host section of ISP24xx NVRAMs contain a new bit which
allows a user to selectively disable ports of an HBA.  These
ports (hosts) will not be presented to the midlayer.

Signed-off-by: Andrew Vasquez <andrew.vasquez@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
diff --git a/drivers/scsi/qla2xxx/qla_def.h b/drivers/scsi/qla2xxx/qla_def.h
index 653e22e..dfcd3a2 100644
--- a/drivers/scsi/qla2xxx/qla_def.h
+++ b/drivers/scsi/qla2xxx/qla_def.h
@@ -2044,6 +2044,7 @@
 		uint32_t	enable_led_scheme	:1;
 		uint32_t	msi_enabled		:1;
 		uint32_t	msix_enabled		:1;
+		uint32_t	disable_serdes		:1;
 	} flags;
 
 	atomic_t	loop_state;