wifi: mt76: mt7996: Add mt7996_mcu_teardown_mld_sta rouine

mt7996_mcu_teardown_mld_sta is used to remove MLO configuration from the
MCU. This is a preliminary patch to enable MLO for MT7996 driver

Co-developed-by: Bo Jiao <Bo.Jiao@mediatek.com>
Signed-off-by: Bo Jiao <Bo.Jiao@mediatek.com>
Co-developed-by: Peter Chiu <chui-hao.chiu@mediatek.com>
Signed-off-by: Peter Chiu <chui-hao.chiu@mediatek.com>
Signed-off-by: Shayne Chen <shayne.chen@mediatek.com>
Co-developed-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Link: https://patch.msgid.link/20250312-b4-mt7996-mlo-p2-v1-3-015b3d6fd928@kernel.org


Signed-off-by: Felix Fietkau <nbd@nbd.name>