ALSA: aoa: Delete an unnecessary check before the function call "snd_pcm_suspend_all"

The snd_pcm_suspend_all() function tests whether its argument is NULL and then
returns immediately. Thus the test around the call is not needed.

This issue was detected by using the Coccinelle software.
Signed-off-by: NMarkus Elfring <elfring@users.sourceforge.net>
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

sound/aoa/soundbus/i2sbus/core.c

@@ -381,10 +381,8 @@ static int i2sbus_suspend(struct macio_dev* dev, pm_message_t state)
 
 	list_for_each_entry(i2sdev, &control->list, item) {
 		/* Notify Alsa */
-		if (i2sdev->sound.pcm) {
-			/* Suspend PCM streams */
-			snd_pcm_suspend_all(i2sdev->sound.pcm);
-		}
+		/* Suspend PCM streams */
+		snd_pcm_suspend_all(i2sdev->sound.pcm);
 
 		/* Notify codecs */
 		list_for_each_entry(cii, &i2sdev->sound.codec_list, list) {