MLVC_PLV
iowrite32(MLVC_PLV, etha->addr + MLVC);
return rswitch_reg_wait(etha->addr, MLVC, MLVC_PLV, 0);
rtsn_modify(priv, MLVC, MLVC_PLV, MLVC_PLV);
ret = rtsn_reg_wait(priv, MLVC, MLVC_PLV, 0);