wifi: mt76: mt7925: add link handling in mt7925_mac_sta_remove

wifi: mt76: mt7925: add link handling in mt7925_mac_sta_remove

Added link handling to mt7925_mac_sta_remove, supporting the MLO-enabled
firmware. The change remains comptabile with the non-MLO mode.

Co-developed-by: Ming Yen Hsieh <mingyen.hsieh@mediatek.com>
Signed-off-by: Ming Yen Hsieh <mingyen.hsieh@mediatek.com>
Co-developed-by: Deren Wu <deren.wu@mediatek.com>
Signed-off-by: Deren Wu <deren.wu@mediatek.com>
Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Link: https://patch.msgid.link/20d53511fe1f64984d893f4d3ec87cb9f87d3070.1720248331.git.sean.wang@kernel.org
Signed-off-by: Felix Fietkau <nbd@nbd.name>