staging: wilc1000: wilc_wlan_txq_filter_dup_tcp_ack: add argument and use wilc

This patch add argument net_device dev and use netdev private data member wilc
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>