ALSA: pcm: Use ERESTARTSYS instead of EINTR in OSS emulation

Fix the last standing EINTR in the whole subsystem.  Use more correct
ERESTARTSYS for pending signals.
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/core/oss/pcm_oss.c

@@ -842,7 +842,7 @@ static int snd_pcm_oss_change_params(struct snd_pcm_substream *substream,
 		if (!(mutex_trylock(&runtime->oss.params_lock)))
 			return -EAGAIN;
 	} else if (mutex_lock_interruptible(&runtime->oss.params_lock))
-		return -EINTR;
+		return -ERESTARTSYS;
 	sw_params = kzalloc(sizeof(*sw_params), GFP_KERNEL);
 	params = kmalloc(sizeof(*params), GFP_KERNEL);
 	sparams = kmalloc(sizeof(*sparams), GFP_KERNEL);