net: UTC trace to net_dev template

Add UTC timestamp to net traces.

Change-Id: I1f794f4664da979162cf47e0a39e6d09f0cc04a0
Acked-by: Raul Martinez <mraul@qti.qualcomm.com>
Signed-off-by: Subash Abhinov Kasiviswanathan <subashab@codeaurora.org>