i2c-au1550: remove unused ack_timeout

The ack_timeout context member is unused, get rid of it.

Signed-off-by: Manuel Lauss <manuel.lauss@googlemail.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
diff --git a/drivers/i2c/busses/i2c-au1550.c b/drivers/i2c/busses/i2c-au1550.c
index 70b027c..98ee11a 100644
--- a/drivers/i2c/busses/i2c-au1550.c
+++ b/drivers/i2c/busses/i2c-au1550.c
@@ -52,7 +52,6 @@
 struct i2c_au1550_data {
 	void __iomem *psc_base;
 	int	xfer_timeout;
-	int	ack_timeout;
 	struct i2c_adapter adap;
 	struct resource *ioarea;
 };
@@ -346,7 +345,6 @@
 		goto out_map;
 	}
 	priv->xfer_timeout = 200;
-	priv->ack_timeout = 200;
 
 	priv->adap.nr = pdev->id;
 	priv->adap.algo = &au1550_algo;