regulator: get pcap data from the parent device

Right now the pcap core driver passes a reference to its pcap data abusing the
subdrivers platform drvdata, this is not good.

Get the reference directly from the parent device.
Signed-off-by: Antonio Ospite <ospite@studenti.unina.it>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

drivers/regulator/pcap-regulator.c

@@ -271,7 +271,7 @@ static struct regulator_desc pcap_regulators[] = {
 static int __devinit pcap_regulator_probe(struct platform_device *pdev)
 {
 	struct regulator_dev *rdev;
-	void *pcap = platform_get_drvdata(pdev);
+	void *pcap = dev_get_drvdata(pdev->dev.parent);
 
 	rdev = regulator_register(&pcap_regulators[pdev->id], &pdev->dev,
 				pdev->dev.platform_data, pcap);