[SCSI] fcoe: Change fcoe receive thread nice value from 19 (lowest priority) to -20

This change makes the fcoe Rx threads have the same nice value
as lpfc and qla2xxx Rx threads.
Signed-off-by: NRobert Love <robert.w.love@intel.com>
Signed-off-by: NJames Bottomley <James.Bottomley@HansenPartnership.com>

drivers/scsi/fcoe/libfcoe.c

@@ -531,7 +531,7 @@ int fcoe_percpu_receive_thread(void *arg)
 	struct fcoe_softc *fc;
 	struct fcoe_hdr *hp;
 
-	set_user_nice(current, 19);
+	set_user_nice(current, -20);
 
 	while (!kthread_should_stop()) {