fix typos concerning "hierarchy"

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
diff --git a/drivers/infiniband/hw/cxgb4/qp.c b/drivers/infiniband/hw/cxgb4/qp.c
index 83a01dc..b321835 100644
--- a/drivers/infiniband/hw/cxgb4/qp.c
+++ b/drivers/infiniband/hw/cxgb4/qp.c
@@ -899,7 +899,7 @@
 	atomic_inc(&qhp->refcnt);
 	spin_unlock_irqrestore(&qhp->lock, *flag);
 
-	/* locking heirarchy: cq lock first, then qp lock. */
+	/* locking hierarchy: cq lock first, then qp lock. */
 	spin_lock_irqsave(&rchp->lock, *flag);
 	spin_lock(&qhp->lock);
 	c4iw_flush_hw_cq(&rchp->cq);
@@ -910,7 +910,7 @@
 	if (flushed)
 		(*rchp->ibcq.comp_handler)(&rchp->ibcq, rchp->ibcq.cq_context);
 
-	/* locking heirarchy: cq lock first, then qp lock. */
+	/* locking hierarchy: cq lock first, then qp lock. */
 	spin_lock_irqsave(&schp->lock, *flag);
 	spin_lock(&qhp->lock);
 	c4iw_flush_hw_cq(&schp->cq);