Staging: winbond: wbusb: Fixed coding style issue

Removed unnecessary printk and pr_debug tracing calls

Signed-off-by: Adil Mujeeb <mujeeb.adil@gmail.com>
Acked-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>