net: usb: cdc_ncm: Adding Dell DW5812 LTE Verizon Mobile Broadband Card

Unlike DW5550, Dell DW5812 is a mobile broadband card with no ARP
capabilities: the patch makes this device to use wwan_noarp_info struct

Signed-off-by: Daniele Palmas <dnlplm@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>