clk: davinci: cfgchip: testing the wrong variable

There is a copy and paste bug here.  We should be testing "usb1" instead
of "usb0".

Fixes: 58e1e2d2 ("clk: davinci: cfgchip: Add TI DA8XX USB PHY clocks")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: David Lechner <david@lechnology.com>

drivers/clk/davinci/da8xx-cfgchip.c

@@ -672,7 +672,7 @@ static int of_da8xx_usb_phy_clk_init(struct device *dev, struct regmap *regmap)
 
 	usb1 = da8xx_cfgchip_register_usb1_clk48(dev, regmap);
 	if (IS_ERR(usb1)) {
-		if (PTR_ERR(usb0) == -EPROBE_DEFER)
+		if (PTR_ERR(usb1) == -EPROBE_DEFER)
 			return -EPROBE_DEFER;
 
 		dev_warn(dev, "Failed to register usb1_clk48 (%ld)\n",