ASoC: drop bogus container_of() error handling

Merge series from Johan Hovold <johan@kernel.org>:

The dev_to_sdw_dev() helper uses container_of() to return the containing
soundwire device structure of its pointer argument and will never
return NULL.

Author: broonie

sound/soc/codecs/pm4125.c

@@ -1533,13 +1533,7 @@ static int pm4125_bind(struct device *dev)
 
 	pm4125->sdw_priv[AIF1_CAP] = dev_get_drvdata(pm4125->txdev);
 	pm4125->sdw_priv[AIF1_CAP]->pm4125 = pm4125;
-
 	pm4125->tx_sdw_dev = dev_to_sdw_dev(pm4125->txdev);
-	if (!pm4125->tx_sdw_dev) {
-		dev_err(dev, "could not get txslave with matching of dev\n");
-		ret = -EINVAL;
-		goto error_put_tx;
-	}
 
 	/*
 	 * As TX is the main CSR reg interface, which should not be suspended first.

sound/soc/codecs/wcd937x.c

@@ -2763,11 +2763,6 @@ static int wcd937x_bind(struct device *dev)
 	wcd937x->sdw_priv[AIF1_CAP] = dev_get_drvdata(wcd937x->txdev);
 	wcd937x->sdw_priv[AIF1_CAP]->wcd937x = wcd937x;
 	wcd937x->tx_sdw_dev = dev_to_sdw_dev(wcd937x->txdev);
-	if (!wcd937x->tx_sdw_dev) {
-		dev_err(dev, "could not get txslave with matching of dev\n");
-		ret = -EINVAL;
-		goto err_put_txdev;
-	}
 
 	/*
 	 * As TX is the main CSR reg interface, which should not be suspended first.

sound/soc/sdw_utils/soc_sdw_utils.c

@@ -1414,10 +1414,6 @@ static int is_sdca_endpoint_present(struct device *dev,
 	}
 
 	slave = dev_to_sdw_dev(sdw_dev);
-	if (!slave) {
-		ret = -EINVAL;
-		goto put_device;
-	}
 
 	/* Make sure BIOS provides SDCA properties */
 	if (!slave->sdca_data.interface_revision) {