staging: unisys: fix CamelCase names in net_pkt_rcv

Fix CamelCase names:

UniqueNum => unique_num
RcvsDroppedDelta => rcvs_dropped_delta

Signed-off-by: Benjamin Romer <benjamin.romer@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>