ASoC: cs4270: Check that we can enable regulators on resume

It's possible that the regulator enable will fail and if it does we may
as well just give up with trying to bring the rest of the device up and
report the original error.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Timur Tabi <timur@freescale.com>

sound/soc/codecs/cs4270.c

@@ -600,10 +600,12 @@ static int cs4270_soc_suspend(struct snd_soc_codec *codec)
 static int cs4270_soc_resume(struct snd_soc_codec *codec)
 {
 	struct cs4270_private *cs4270 = snd_soc_codec_get_drvdata(codec);
-	int reg;
+	int reg, ret;
 
-	regulator_bulk_enable(ARRAY_SIZE(cs4270->supplies),
+	ret = regulator_bulk_enable(ARRAY_SIZE(cs4270->supplies),
 				    cs4270->supplies);
+	if (ret != 0)
+		return ret;
 
 	/* In case the device was put to hard reset during sleep, we need to
 	 * wait 500ns here before any I2C communication. */