regulator: sy7636a: Use rdev_get_drvdata at proper place

At the context with *rdev, use rdev_get_drvdata() is more intuitive.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Reviewed-by: Alistair Francis <alistair@alistair23.me>
Link: https://lore.kernel.org/r/20210616034458.3499522-3-axel.lin@ingics.comSigned-off-by: Mark Brown <broonie@kernel.org>

drivers/regulator/sy7636a-regulator.c

@@ -35,7 +35,7 @@ static int sy7636a_get_vcom_voltage_op(struct regulator_dev *rdev)
 
 static int sy7636a_get_status(struct regulator_dev *rdev)
 {
-	struct sy7636a *sy7636a = dev_get_drvdata(rdev->dev.parent);
+	struct sy7636a *sy7636a = rdev_get_drvdata(rdev);
 	int ret = 0;
 
 	ret = gpiod_get_value_cansleep(sy7636a->pgood_gpio);