mfd: core: Fix memory leak of 'cell'

When creating a platform device from an MFD cell description, we
allocate some memory and make a copy which is then stored inside the
platform_device's structure.  However, care is not currently taken to
free the allocated memory when the platform device is torn down.

This patch takes care of the leak.

Signed-off-by: Lee Jones <lee.jones@linaro.org>

drivers/mfd/mfd-core.c

@@ -297,7 +297,10 @@ static int mfd_remove_devices_fn(struct device *dev, void *data)
 	regulator_bulk_unregister_supply_alias(dev, cell->parent_supplies,
 					       cell->num_parent_supplies);
 
+	kfree(cell);
+
 	platform_device_unregister(pdev);
+
 	return 0;
 }