staging: wilc1000: Don't keep a copy of wiphy parameters in the driver

host_if_drv.cfg_values is a write only member, and can be removed

Signed-off-by: Adham Abozaeid <adham.abozaeid@microchip.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>