MT_WCID_DROP
u32 val = mt76_rr(dev, MT_WCID_DROP(idx));
mt76_wr(dev, MT_WCID_DROP(idx), (val & ~bit) | (bit * drop));
mt76_clear(dev, MT_WCID_DROP(idx), MT_WCID_DROP_MASK(idx));
mt76_set(dev, MT_WCID_DROP(idx), MT_WCID_DROP_MASK(idx));