coresight: fixing validity check on remote device

A validity check should be made on the remote device, i.e rdev,
rather than the current device.

Signed-off-by: Kaixu Xia <xiakaixu@huawei.com>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/coresight/of_coresight.c b/drivers/coresight/of_coresight.c
index 89ebbe2..9a5ff56 100644
--- a/drivers/coresight/of_coresight.c
+++ b/drivers/coresight/of_coresight.c
@@ -174,7 +174,7 @@
 				continue;
 
 			rdev = of_coresight_get_endpoint_device(rparent);
-			if (!dev)
+			if (!rdev)
 				continue;
 
 			pdata->child_names[i] = dev_name(rdev);