wifi: rtw89: 8852bx: add extra handles of BTC for 8852BT in 8852b_common

For 8852BT, the initial settings of BT-coexistence is a little bit
different, so add the extra handles.

Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Link: https://patch.msgid.link/20240701014619.7300-2-pkshih@realtek.com