IXGBE_DTXCTL
reg = IXGBE_READ_REG(hw, IXGBE_DTXCTL);
IXGBE_WRITE_REG(hw, IXGBE_DTXCTL, reg);
{ IXGBE_DTXCTL, 1, SET_READ_TEST, 0x00000005, 0x00000005 },
regs_buff[793] = IXGBE_READ_REG(hw, IXGBE_DTXCTL);