ALSA: hda - Fix beep_device compilation warnings

Using static inline functions can reduce compilation messages
and macro misuse.

 sound/pci/hda/patch_conexant.c: In function ‘patch_cxt5045’:
 sound/pci/hda/patch_conexant.c:1232:3: warning: statement with no effect
Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/hda/hda_beep.h

@@ -50,7 +50,12 @@ int snd_hda_enable_beep_device(struct hda_codec *codec, int enable);
 int snd_hda_attach_beep_device(struct hda_codec *codec, int nid);
 void snd_hda_detach_beep_device(struct hda_codec *codec);
 #else
-#define snd_hda_attach_beep_device(...)		0
-#define snd_hda_detach_beep_device(...)
+static inline int snd_hda_attach_beep_device(struct hda_codec *codec, int nid)
+{
+	return 0;
+}
+void snd_hda_detach_beep_device(struct hda_codec *codec)
+{
+}
 #endif
 #endif