wifi: rtw89: mcc: correct frequency when MCC

The frequency get from PPDU status set as center channel during MCC,
but we need to report to mac80211 as primary channel. Therefore, we
use the chanctx information in software to instead it.

Signed-off-by: Chih-Kang Chang <gary.chang@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Link: https://patch.msgid.link/20250610130034.14692-4-pkshih@realtek.com