dm: treewide: Do not opencode uclass_probe_all()

We already have a function for probing all devices of a specific class,
use it.

Signed-off-by: Michal Suchanek <msuchanek@suse.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/test/test-main.c b/test/test-main.c
index d74df29..a98a77d 100644
--- a/test/test-main.c
+++ b/test/test-main.c
@@ -165,16 +165,7 @@
 /* Ensure all the test devices are probed */
 static int do_autoprobe(struct unit_test_state *uts)
 {
-	struct udevice *dev;
-	int ret;
-
-	/* Scanning the uclass is enough to probe all the devices */
-	for (ret = uclass_first_device(UCLASS_TEST, &dev);
-	     dev;
-	     ret = uclass_next_device(&dev))
-		;
-
-	return ret;
+	return uclass_probe_all(UCLASS_TEST);
 }
 
 /*