wifi: rtw89: debug: add FW log component for MLO

This allows showing MLO related logs when FW debug mode is on.

Signed-off-by: Po-Hao Huang <phhuang@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Link: https://patch.msgid.link/20250505072440.45113-10-pkshih@realtek.com