ALSA: hda - Check "beep" hint

Check the hint "beep" in snd_hda_attach_beep_device() to avoid the beep
device creation if user doesn't want.
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/hda/hda_beep.c

@@ -24,6 +24,7 @@
 #include <linux/workqueue.h>
 #include <sound/core.h>
 #include "hda_beep.h"
+#include "hda_local.h"
 
 enum {
 	DIGBEEP_HZ_STEP = 46875,	/* 46.875 Hz */
@@ -115,6 +116,9 @@ int snd_hda_attach_beep_device(struct hda_codec *codec, int nid)
 	struct hda_beep *beep;
 	int err;
 
+	if (!snd_hda_get_bool_hint(codec, "beep"))
+		return 0; /* disabled explicitly */
+
 	beep = kzalloc(sizeof(*beep), GFP_KERNEL);
 	if (beep == NULL)
 		return -ENOMEM;