qcacld-3.0: Log pkt_stats to logger thread for sw_event

pktlog log types were received as individual log types
like PKTLOG_TYPE_TX_CTRL, PKTLOG_TYPE_RC_FIND, etc.
As per the current implementation, FW sends an
aggregated log type as PKTLOG_TYPE_SW_EVENT.
This aggregated log type event is not logged to
userspace.

Log sw_event pkt_stats to logger thread in
process_sw_event.

Change-Id: I5b12ecce25af6395a10eb7c7452a7eeb042d7c0a
CRs-Fixed: 2396980