net: ch9200: remove unnecessary return

The return is not needed, remove it.

Signed-off-by: Chen Zhou <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

drivers/net/usb/ch9200.c

···
 		err = -EINVAL;
 	kfree(buf);
 
-	return err;
-
 err_out:
 	return err;
 }