usb: phy-twl6030: Add missing braces

Silences the below warning:
WARNING: sizeof *twl should be sizeof(*twl)

Signed-off-by: Sachin Kamat <[e-mail]>
Signed-off-by: Felipe Balbi <[e-mail]>

drivers/usb/phy/phy-twl6030-usb.c

···
 	struct device		*dev = &pdev->dev;
 	struct twl4030_usb_data	*pdata = dev_get_platdata(dev);
 
-	twl = devm_kzalloc(dev, sizeof *twl, GFP_KERNEL);
+	twl = devm_kzalloc(dev, sizeof(*twl), GFP_KERNEL);
 	if (!twl)
 		return -ENOMEM;