[SCSI] hpsa: use usleep_range not msleep for small sleeps

Signed-off-by: NStephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: NJames Bottomley <James.Bottomley@suse.de>

drivers/scsi/hpsa.c

@@ -3571,7 +3571,7 @@ static void __devinit hpsa_wait_for_mode_change_ack(struct ctlr_info *h)
 		if (!doorbell_value & CFGTBL_ChangeReq)
 			break;
 		/* delay and try again */
-		msleep(10);
+		usleep_range(10000, 20000);
 	}
 }