staging: wilc1000: host_int_init: add argument net_device

This patch add argument net_device and pass netdev private data member wilc
to kthread_run. Pass net_device to the function as well.

Signed-off-by: Glen Lee <glen.lee@atmel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>