wifi: mt76: mt7925: adjust rm BSS flow to prevent next connection failure

wifi: mt76: mt7925: adjust rm BSS flow to prevent next connection failure

Removing BSS without removing STAREC first will cause firmware
abnormal and next connection fail.

Fixes: 816161051a03 ("wifi: mt76: mt7925: Cleanup MLO settings post-disconnection")
Cc: stable@vger.kernel.org
Co-developed-by: Sean Wang <sean.wang@mediatek.com>
Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Tested-by: Caleb Jorden <cjorden@gmail.com>
Signed-off-by: Ming Yen Hsieh <mingyen.hsieh@mediatek.com>
Link: https://patch.msgid.link/20250305000851.493671-4-sean.wang@kernel.org
Signed-off-by: Felix Fietkau <nbd@nbd.name>