wifi: rtw89: phy: add BB wrapper of TX power for WiFi 7 chips

TX power is controlled by BB layer basically, but it should interact with
MAC layer, so these registers are put on MAC register domain and called
BB wrapper, which contains TX power for each MAC ID, OFDMA RU power, and
consideration of power type table.

Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://msgid.link/20240105064433.36870-1-pkshih@realtek.com