phy: lantiq: Fix compile warning

This local variable is unused, remove it.

Fixes: dea54fba ("phy: Add an USB PHY driver for the Lantiq SoCs using the RCU module")
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>

drivers/phy/lantiq/phy-lantiq-rcu-usb2.c

@@ -156,7 +156,6 @@ static int ltq_rcu_usb2_of_parse(struct ltq_rcu_usb2_priv *priv,
 {
 	struct device *dev = priv->dev;
 	const __be32 *offset;
-	int ret;
 
 	priv->reg_bits = of_device_get_match_data(dev);