ALSA: emux: Convert timers to use timer_setup()

In preparation for unconditionally passing the struct timer_list pointer to
all timer callbacks, switch to using the new timer_setup() and from_timer()
to pass the timer pointer explicitly.
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/synth/emux/emux.c

@@ -53,7 +53,7 @@ int snd_emux_new(struct snd_emux **remu)
 	emu->max_voices = 0;
 	emu->use_time = 0;
 
-	setup_timer(&emu->tlist, snd_emux_timer_callback, (unsigned long)emu);
+	timer_setup(&emu->tlist, snd_emux_timer_callback, 0);
 	emu->timer_active = 0;
 
 	*remu = emu;

sound/synth/emux/emux_synth.c

@@ -202,9 +202,9 @@ snd_emux_note_off(void *p, int note, int vel, struct snd_midi_channel *chan)
  *
  * release the pending note-offs
  */
-void snd_emux_timer_callback(unsigned long data)
+void snd_emux_timer_callback(struct timer_list *t)
 {
-	struct snd_emux *emu = (struct snd_emux *) data;
+	struct snd_emux *emu = from_timer(emu, t, tlist);
 	struct snd_emux_voice *vp;
 	unsigned long flags;
 	int ch, do_again = 0;

sound/synth/emux/emux_voice.h

@@ -55,7 +55,7 @@ void snd_emux_update_channel(struct snd_emux_port *port,
 			     struct snd_midi_channel *chan, int update);
 void snd_emux_update_port(struct snd_emux_port *port, int update);
 
-void snd_emux_timer_callback(unsigned long data);
+void snd_emux_timer_callback(struct timer_list *t);
 
 /* emux_effect.c */
 #ifdef SNDRV_EMUX_USE_RAW_EFFECT