ASoC: Ensure all DAPM widgets are instantiated with the card

Specifically for the widgets added by machine driver late probe functions.
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>

sound/soc/soc-core.c

@@ -1478,6 +1478,8 @@ static void snd_soc_instantiate_card(struct snd_soc_card *card)
 		}
 	}
 
+	snd_soc_dapm_new_widgets(&card->dapm);
+
 	ret = snd_card_register(card->snd_card);
 	if (ret < 0) {
 		printk(KERN_ERR "asoc: failed to register soundcard for %s\n", card->name);