wifi: mt76: mt7925: update mt7925_mcu_sta_phy_tlv for MLO

when we serve MLO during the multiple-linked connection, the chanctx may
be not available in the internal driver, we should get the proper the
band information from link_conf for the MLO-enabled 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/6620e00fbeef686fb2041556deba346411eab0f1.1720248331.git.sean.wang@kernel.org


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