ALSA: rme96: Simplify with DEFINE_SIMPLE_DEV_PM_OPS()

Use the new DEFINE_SIMPLE_DEV_PM_OPS() instead of SIMPLE_DEV_PM_OPS()
for code-simplification.  We need no longer CONFIG_PM_SLEEP ifdefs.

The temporary buffers for PCM stream backups are conditionally
allocated since the sizes aren't too small.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Link: https://lore.kernel.org/r/20240207155140.18238-27-tiwai@suse.deSigned-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/rme96.c

@@ -220,12 +220,10 @@ struct rme96 {
 
 	u8 rev; /* card revision number */
 
-#ifdef CONFIG_PM_SLEEP
 	u32 playback_pointer;
 	u32 capture_pointer;
 	void *playback_suspend_buffer;
 	void *capture_suspend_buffer;
-#endif
 
 	struct snd_pcm_substream *playback_substream;
 	struct snd_pcm_substream *capture_substream;
@@ -1543,10 +1541,8 @@ snd_rme96_free(struct rme96 *rme96)
 		rme96->areg &= ~RME96_AR_DAC_EN;
 		writel(rme96->areg, rme96->iobase + RME96_IO_ADDITIONAL_REG);
 	}
-#ifdef CONFIG_PM_SLEEP
 	vfree(rme96->playback_suspend_buffer);
 	vfree(rme96->capture_suspend_buffer);
-#endif
 }
 
 static void
@@ -2329,8 +2325,6 @@ snd_rme96_create_switches(struct snd_card *card,
  * Card initialisation
  */
 
-#ifdef CONFIG_PM_SLEEP
-
 static int rme96_suspend(struct device *dev)
 {
 	struct snd_card *card = dev_get_drvdata(dev);
@@ -2392,11 +2386,7 @@ static int rme96_resume(struct device *dev)
 	return 0;
 }
 
-static SIMPLE_DEV_PM_OPS(rme96_pm, rme96_suspend, rme96_resume);
-#define RME96_PM_OPS	&rme96_pm
-#else
-#define RME96_PM_OPS	NULL
-#endif /* CONFIG_PM_SLEEP */
+static DEFINE_SIMPLE_DEV_PM_OPS(rme96_pm, rme96_suspend, rme96_resume);
 
 static void snd_rme96_card_free(struct snd_card *card)
 {
@@ -2432,14 +2422,14 @@ __snd_rme96_probe(struct pci_dev *pci,
 	if (err)
 		return err;
 	
-#ifdef CONFIG_PM_SLEEP
-	rme96->playback_suspend_buffer = vmalloc(RME96_BUFFER_SIZE);
-	if (!rme96->playback_suspend_buffer)
-		return -ENOMEM;
-	rme96->capture_suspend_buffer = vmalloc(RME96_BUFFER_SIZE);
-	if (!rme96->capture_suspend_buffer)
-		return -ENOMEM;
-#endif
+	if (IS_ENABLED(CONFIG_PM_SLEEP)) {
+		rme96->playback_suspend_buffer = vmalloc(RME96_BUFFER_SIZE);
+		if (!rme96->playback_suspend_buffer)
+			return -ENOMEM;
+		rme96->capture_suspend_buffer = vmalloc(RME96_BUFFER_SIZE);
+		if (!rme96->capture_suspend_buffer)
+			return -ENOMEM;
+	}
 
 	strcpy(card->driver, "Digi96");
 	switch (rme96->pci->device) {
@@ -2483,7 +2473,7 @@ static struct pci_driver rme96_driver = {
 	.id_table = snd_rme96_ids,
 	.probe = snd_rme96_probe,
 	.driver = {
-		.pm = RME96_PM_OPS,
+		.pm = &rme96_pm,
 	},
 };