dsp: initialize head of client linked list

Client list head is initialized during audio notifier probe,
and clients cant be added to the list before it is initialized,
which can lead to undesired behavior.
Initialize client list head during declaration.

Change-Id: I03fe218399662df8ac0665f34273c8e7749c1ad2
Signed-off-by: Vignesh Kulothungan <[email protected]>

dsp/audio_notifier.c

@@ -111,7 +111,7 @@ static struct service_info service_data[AUDIO_NOTIFIER_MAX_SERVICES]
 };
 
 /* Master list of all audio notifier clients */
-struct list_head   client_list;
+LIST_HEAD(client_list);
 struct mutex       notifier_mutex;
 
 static int audio_notifier_get_default_service(int domain)
@@ -574,7 +574,6 @@ static int audio_notifier_subsys_init(void)
 	int i, j;
 
 	mutex_init(&notifier_mutex);
-	INIT_LIST_HEAD(&client_list);
 	for (i = 0; i < AUDIO_NOTIFIER_MAX_SERVICES; i++) {
 		for (j = 0; j < AUDIO_NOTIFIER_MAX_DOMAINS; j++) {
 			if (service_data[i][j].state <= NO_SERVICE)