staging: wilc1000: linux_wlan_start_firmware: change argument with dev

This patch changes argument nic with dev and use netdev private data member
wilc instead of g_linux_wlan, and pass dev to the function as well.

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