ASoC: cs35l35: Clear reset_gpio on the error path in probe

The error path in probe attempts to put the device back into reset.
Should we fail to get the reset_gpio (such as a probe defer) we will
leave the error value in there, which the gpiod_set_value_cansleep on
the error path will attempt to deference.

Fix this issue by clearing reset_gpio before we head into the error
path.
Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Acked-by: Brian Austin <brian.austin@cirrus.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/cs35l35.c

@@ -1412,10 +1412,10 @@ static int cs35l35_i2c_probe(struct i2c_client *i2c_client,
 						      GPIOD_OUT_LOW);
 	if (IS_ERR(cs35l35->reset_gpio)) {
 		ret = PTR_ERR(cs35l35->reset_gpio);
+		cs35l35->reset_gpio = NULL;
 		if (ret == -EBUSY) {
 			dev_info(dev,
 				 "Reset line busy, assuming shared reset\n");
-			cs35l35->reset_gpio = NULL;
 		} else {
 			dev_err(dev, "Failed to get reset GPIO: %d\n", ret);
 			goto err;