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

Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
diff --git a/drivers/scsi/hpsa.c b/drivers/scsi/hpsa.c
index 10076f1..ddd729e 100644
--- a/drivers/scsi/hpsa.c
+++ b/drivers/scsi/hpsa.c
@@ -3571,7 +3571,7 @@
 		if (!doorbell_value & CFGTBL_ChangeReq)
 			break;
 		/* delay and try again */
-		msleep(10);
+		usleep_range(10000, 20000);
 	}
 }