ifconfig does not report RX/TX errors
ifconfig does not report RX/TX errors, by this RX/TX error counters
reported via SNMP in IF-MIB::ifTable are not valid.
So far it was not a problem was not visible since all FPGA counters were exported via pstats interface and no one used ifconfig to check rx/tx errors.
Add rx/tx error counters in pstats driver.
reported by Ilja Slepnev