net: UTC trace event change

Add UTC timestamp to net traces.
Add netif_receive exit traces.
Reworked trace file to pass Checkpatch.

CRs-Fixed: 2570722
Change-Id: I484c77b72b43872097c92158e1d978b4313eb87d
Acked-by: Raul Martinez <mraul@qti.qualcomm.com>
Signed-off-by: Subash Abhinov Kasiviswanathan <subashab@codeaurora.org>