ALSA: aoa: Use device_type helpers to access the node type

Remove directly accessing device_node.type pointer and use the accessors
instead. This will eventually allow removing the type pointer.

Replace the open coded iterating over child nodes with
for_each_child_of_node() while we're here.

Cc: Johannes Berg <johannes@sipsolutions.net>
Cc: Jaroslav Kysela <perex@perex.cz>
Cc: Takashi Iwai <tiwai@suse.com>
Cc: linuxppc-dev@lists.ozlabs.org
Cc: alsa-devel@alsa-project.org
Signed-off-by: Rob Herring <robh@kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/aoa/fabrics/layout.c

@@ -1008,8 +1008,8 @@ static int aoa_fabric_layout_probe(struct soundbus_dev *sdev)
 		return -ENODEV;
 
 	/* by breaking out we keep a reference */
-	while ((sound = of_get_next_child(sdev->ofdev.dev.of_node, sound))) {
-		if (sound->type && strcasecmp(sound->type, "soundchip") == 0)
+	for_each_child_of_node(sdev->ofdev.dev.of_node, sound) {
+		if (of_node_is_type(sound, "soundchip"))
 			break;
 	}
 	if (!sound)

sound/aoa/soundbus/core.c

@@ -78,7 +78,7 @@ static int soundbus_uevent(struct device *dev, struct kobj_uevent_env *env)
 	if (retval)
 		return retval;
 
-	retval = add_uevent_var(env, "OF_TYPE=%s", of->dev.of_node->type);
+	retval = add_uevent_var(env, "OF_TYPE=%s", of_node_get_device_type(of->dev.of_node));
 	if (retval)
 		return retval;