Move pktlog_filter from struct ath10k_debug to struct ath10k
so that pktlog can be enabled even when debugfs is not
enabled, needed to enable peer tx stats for 10.2.4.

No changes in functionality.
Signed-off-by: Anilkumar Kolli <akolli@qti.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>