staging: wilc1000: linux_wlan_firmware_download: change argument

This patch changes argument p_nic with wilc and use it instead of
g_linux_wlan. Pass argument dev to the function.

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