wifi: mt76: mt7925: update mt7925_mcu_add_bss_info for MLO

Update mt7925_mcu_bss_mld_tlv for the MLO-enabled firmware

The change remains compatible with the non-MLO mode and the
older firmware.

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/a3d03b0a1ca916b2b8b2e7c0afcdcd7e258d97c3.1720248331.git.sean.wang@kernel.org


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