block: Remove "requeuing urgent req" error messages

It is possible for URGENT request to be requeued/reinserted if it was
fetched during the creation of a packed list. This end case is rare and is
not handled at the moment.
This patch changes the messages notifying of the above to debug level
(instead of error) in order to clear the dmesg log.

Change-Id: Ie8bc067e61559a6f702077b95c5dbcc426404232
Signed-off-by: Tatyana Brokhman <tlinder@codeaurora.org>
diff --git a/block/blk-core.c b/block/blk-core.c
index 2b6595c..153240e 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -1086,7 +1086,7 @@
 		 * urgent requests. We want to be able to track this
 		 * down.
 		 */
-		pr_err("%s(): requeueing an URGENT request", __func__);
+		pr_debug("%s(): requeueing an URGENT request", __func__);
 		WARN_ON(!q->dispatched_urgent);
 		q->dispatched_urgent = false;
 	}
@@ -1123,7 +1123,7 @@
 		 * urgent requests. We want to be able to track this
 		 * down.
 		 */
-		pr_err("%s(): reinserting an URGENT request", __func__);
+		pr_debug("%s(): reinserting an URGENT request", __func__);
 		WARN_ON(!q->dispatched_urgent);
 		q->dispatched_urgent = false;
 	}