E1000_PCS_LCTL
reg = rd32(E1000_PCS_LCTL);
wr32(E1000_PCS_LCTL, reg);
pcs_ctrl_reg = rd32(E1000_PCS_LCTL);
wr32(E1000_PCS_LCTL, pcs_ctrl_reg);
reg = rd32(E1000_PCS_LCTL);
wr32(E1000_PCS_LCTL, reg);
regs_buff[48] = rd32(E1000_PCS_LCTL);