MPIC_LSC
lsc = FIELD_GET(MPIC_LSC, ioread32(etha->addr + MPIC));
rswitch_modify(etha->addr, MPIC, MPIC_PIS | MPIC_LSC,
FIELD_PREP(MPIC_PIS, pis) | FIELD_PREP(MPIC_LSC, lsc));