ALSA: core: release the constraint check for replace ops

Suppose the ALSA card already has a number of MAX_USER_CONTROLS controls, and
the user wants to replace one, it should not fail at this condition check.
Signed-off-by: Lu Guanqun <guanqun.lu@intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/core/control.c

@@ -1073,7 +1073,7 @@ static int snd_ctl_elem_add(struct snd_ctl_file *file,
 	struct user_element *ue;
 	int idx, err;
 
-	if (card->user_ctl_count >= MAX_USER_CONTROLS)
+	if (!replace && card->user_ctl_count >= MAX_USER_CONTROLS)
 		return -ENOMEM;
 	if (info->count < 1)
 		return -EINVAL;