mfd: Add WM8326 support

The WM8326 is a high performance variant of the WM832x series with
no software visible differences.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
diff --git a/drivers/mfd/wm831x-i2c.c b/drivers/mfd/wm831x-i2c.c
index 156b198..38be520 100644
--- a/drivers/mfd/wm831x-i2c.c
+++ b/drivers/mfd/wm831x-i2c.c
@@ -108,6 +108,7 @@
 	{ "wm8320", WM8320 },
 	{ "wm8321", WM8321 },
 	{ "wm8325", WM8325 },
+	{ "wm8326", WM8326 },
 	{ }
 };
 MODULE_DEVICE_TABLE(i2c, wm831x_i2c_id);