dm: core: Allow getting some basic stats

Add a function that returns some basic stats about driver model. For now
we only have two.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/include/dm/root.h b/include/dm/root.h
index 42510b1..780f269 100644
--- a/include/dm/root.h
+++ b/include/dm/root.h
@@ -131,4 +131,12 @@
 static inline int dm_remove_devices_flags(uint flags) { return 0; }
 #endif
 
+/**
+ * dm_get_stats() - Get some stats for driver mode
+ *
+ * @device_countp: Returns total number of devices that are bound
+ * @uclass_countp: Returns total number of uclasses in use
+ */
+void dm_get_stats(int *device_countp, int *uclass_countp);
+
 #endif