[SCSI] qla2xxx: Print thermal unsupported message.

When the Read SFP mailbox command fails on the thermal device,
print a message explaining that thermal is not supported.

Signed-off-by: Joe Carnuccio <joe.carnuccio@qlogic.com>
Signed-off-by: Saurav Kashyap <saurav.kashyap@qlogic.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>