ath10k: add extra pdev stats on 10.1 firmware

As pointed out by Michal Kazior, add extra pdev stats
for 10.1 firmware.

Signed-off-by: Chun-Yeow Yeoh <yeohchunyeow@gmail.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>