wifi: rtw89: 8852c: check LPS H2C command complete by C2H reg instead of done ack

8852C after FW 0.27.128.0 driver check LPS H2C command received by FW
using C2H reg instead of done ack.

Signed-off-by: Chih-Kang Chang <gary.chang@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Link: https://patch.msgid.link/20250811123934.15614-1-pkshih@realtek.com