staging: wilc1000: avoid line over 80 chars in wilc_wlan_txq_filter_dup_tcp_ack()

Cleanup patch to avoid line over 80 chars checkpatch issue introduced in
previous code refactor commit.

Signed-off-by: Ajay Singh <ajay.kathat@microchip.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>