[SCSI] add 6.0 Gbit phy definitions to the sas transport class

I don't think these exist in silicon yet, but the aic94xx driver has a
register setting for them.
Signed-off-by: NJames Bottomley <James.Bottomley@SteelEye.com>

drivers/scsi/scsi_transport_sas.c

@@ -151,6 +151,7 @@ static struct {
 	{ SAS_SATA_SPINUP_HOLD,		"Spin-up hold" },
 	{ SAS_LINK_RATE_1_5_GBPS,	"1.5 Gbit" },
 	{ SAS_LINK_RATE_3_0_GBPS,	"3.0 Gbit" },
+	{ SAS_LINK_RATE_6_0_GBPS,	"6.0 Gbit" },
 };
 sas_bitfield_name_search(linkspeed, sas_linkspeed_names)
 

include/scsi/scsi_transport_sas.h

@@ -30,6 +30,7 @@ enum sas_linkrate {
 	SAS_SATA_PORT_SELECTOR,
 	SAS_LINK_RATE_1_5_GBPS,
 	SAS_LINK_RATE_3_0_GBPS,
+	SAS_LINK_RATE_6_0_GBPS,
 	SAS_LINK_VIRTUAL,
 };