mfd: Pass driver_data onto child devices

The MFD cell structure provides a driver_data field but doesn't pass it
on to the child devices when instantiating them - do that.

Signed-off-by: Mark Brown <[e-mail]>
Signed-off-by: Samuel Ortiz <[e-mail]>

drivers/mfd/mfd-core.c

···
 		goto fail_device;
 
 	pdev->dev.parent = parent;
+	platform_set_drvdata(pdev, cell->driver_data);
 
 	ret = platform_device_add_data(pdev,
 			cell->platform_data, cell->data_size);