ALSA: hda: convert audio_component member of hdac_bus to void pointer

The hdac_bus->audio_component is used as a pointer to a
'struct drm_audio_component' or to 'struct i915_audio_component' while it's
type is 'struct drm_audio_component'.

Convert it to void* to avoid this abuse.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>

Author: ujfalusi

include/sound/hdaudio.h

@@ -366,7 +366,7 @@ struct hdac_bus {
 	struct mutex lock;
 
 	/* DRM component interface */
-	struct drm_audio_component *audio_component;
+	void *audio_component;
 	long display_power_status;
 	unsigned long display_power_active;
 

sound/hda/hdac_component.c

@@ -252,10 +252,12 @@ static const struct component_master_ops hdac_component_master_ops = {
 int snd_hdac_acomp_register_notifier(struct hdac_bus *bus,
 				    const struct drm_audio_component_audio_ops *aops)
 {
-	if (!bus->audio_component)
+	struct drm_audio_component *acomp = bus->audio_component;
+
+	if (!acomp)
 		return -ENODEV;
 
-	bus->audio_component->audio_ops = aops;
+	acomp->audio_ops = aops;
 	return 0;
 }
 EXPORT_SYMBOL_GPL(snd_hdac_acomp_register_notifier);