ath10k: add tracing for ath10k_htt_pktlog

This is useful for collecting pktlog statistics of tx, rx
and rate information, so add tracing for the API call.

Signed-off-by: Rajkumar Manoharan <rmanohar@qti.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>