net: rmnet_data: Update copyright for rmnet_data_trace.h

Update copyright separately for this file so that the subsequent
change can be propagated without merge conflicts.

CRs-Fixed: 991792
Change-Id: Ib1af02d00e438f48619eacee291b1875671978e1
Signed-off-by: Subash Abhinov Kasiviswanathan <subashab@codeaurora.org>