usb: misc: usb3503: Update error code in print message

'err' is uninitialized, rather print the error code directly.

This also fixes following warning.
drivers/usb/misc/usb3503.c: In function ‘usb3503_probe’:
drivers/usb/misc/usb3503.c:195:11: warning: ‘err’ may be used uninitialized
in this function [-Wmaybe-uninitialized]
    dev_err(dev, "unable to request refclk (%d)\n", err);
Signed-off-by: NTushar Behera <tushar.b@samsung.com>
Acked-by: NMarek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/misc/usb3503.c

@@ -192,7 +192,8 @@ static int usb3503_probe(struct usb3503 *hub)
 
 		clk = devm_clk_get(dev, "refclk");
 		if (IS_ERR(clk) && PTR_ERR(clk) != -ENOENT) {
-			dev_err(dev, "unable to request refclk (%d)\n", err);
+			dev_err(dev, "unable to request refclk (%ld)\n",
+					PTR_ERR(clk));
 			return PTR_ERR(clk);
 		}