wifi: rtw89: register ops of can_activate_links

Register mac80211 ops of can_activate_links which is required when
we are ready to enable multiple active links.

Signed-off-by: Zong-Zhe Yang <kevin_yang@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Link: https://patch.msgid.link/20241120034054.13575-3-pkshih@realtek.com