mfd: Supply IRQ base for WM832x devices

Without this the IRQ base will not be correctly configured for the
subdevices.

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

drivers/mfd/wm831x-core.c

···
 	case WM8325:
 		ret = mfd_add_devices(wm831x->dev, -1,
 				      wm8320_devs, ARRAY_SIZE(wm8320_devs),
-				      NULL, 0);
+				      NULL, wm831x->irq_base);
 		break;
 
 	default: