wifi: rtw89: pci: correct interrupt mitigation register for 8852CE

To reduce interrupt count, configure mitigation register with thresholds
of time and packet count. We missed that 8852CE uses different register
address, so correct it. Then, interrupt counts down to 30,763 from 229,825
during stress test in 20 seconds.

Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20231110012319.12727-7-pkshih@realtek.com