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 <broonie@opensource.wolfsonmicro.com>
Cc: stable@kernel.org
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
diff --git a/drivers/mfd/wm831x-core.c b/drivers/mfd/wm831x-core.c
index 7d2563f..e1a2f4b 100644
--- a/drivers/mfd/wm831x-core.c
+++ b/drivers/mfd/wm831x-core.c
@@ -1620,7 +1620,7 @@
 	case WM8325:
 		ret = mfd_add_devices(wm831x->dev, -1,
 				      wm8320_devs, ARRAY_SIZE(wm8320_devs),
-				      NULL, 0);
+				      NULL, wm831x->irq_base);
 		break;
 
 	default: