mac80211_hwsim: record stats in non-netlink path

The data go through mac80211_hwsim_tx_frame_no_nl() wasn't counted.

Signed-off-by: Nguyen Dinh Phi <phind.uet@gmail.com>
Link: https://lore.kernel.org/r/20210622152429.881230-1-phind.uet@gmail.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>