driver core: class: Correct WARN() message in APIs class_(for_each|find)_device()

For both API class_for_each_device(const struct class *class, ...) and
class_find_device(const struct class *class, ...), their WARN() messages
prompt @Class was not initialized when suffer class_to_subsys(@Class)
error, but the error actually means @Class was not registered, so these
warning messages are not accurate.

Fix by replacing term initialized with registered within these messages.

Signed-off-by: Zijun Hu <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>

Author: Zijun Hu

drivers/base/class.c

@@ -405,7 +405,7 @@ int class_for_each_device(const struct class *class, const struct device *start,
 	if (!class)
 		return -EINVAL;
 	if (!sp) {
-		WARN(1, "%s called for class '%s' before it was initialized",
+		WARN(1, "%s called for class '%s' before it was registered",
 		     __func__, class->name);
 		return -EINVAL;
 	}
@@ -453,7 +453,7 @@ struct device *class_find_device(const struct class *class, const struct device
 	if (!class)
 		return NULL;
 	if (!sp) {
-		WARN(1, "%s called for class '%s' before it was initialized",
+		WARN(1, "%s called for class '%s' before it was registered",
 		     __func__, class->name);
 		return NULL;
 	}