skb: printing port numbers with gso trace events

Adding source and destination port number info
in the gso trace events to differentiate between
the flows.

Change-Id: Idbae7f95dfd56293805b58e3c6626f5f6e07d08a
Acked-by: Ashwanth Goli <ashwanth@qti.qualcomm.com>
Signed-off-by: Ravinder Konka <rkonka@codeaurora.org>