MT_MIB_MB_SDR1
val = mt76_rr(dev, MT_MIB_MB_SDR1(ext_phy, i));
val = mt76_rr(dev, MT_MIB_MB_SDR1(band, (i << 4)));
val = mt76_rr(dev, MT_MIB_MB_SDR1(band, (i << 2)));