wifi: rtw89: mcc: add H2C command to support different PD level in MCC

Packet detection(PD) lower bound is the threshold for sensing packet,
and it is dynamically calculated based on RSSI. In MCC, the two
interfaces have different RSSI values, so it is necessary to set
different values to ensure packets can be received. Therefore, add
H2C command to let firmware to switch PD lower bound when MCC mode.

Signed-off-by: Chih-Kang Chang <gary.chang@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Link: https://patch.msgid.link/20250710042423.73617-2-pkshih@realtek.com