aRxFrameMismatchedLength
This counter reports the number of received frames where the actual physical frame length
does not match the value in the Ethertype/ Length field. It increments only for valid,
non-error frames. For such frames, rx_axis_mac_tuser is asserted. Figure 1 illustrates the
aRxFrameMismatchedLength statistic updates relative to the RX
frames at AXI ST interface.