Same narrative as eb2dc35d ("r8169: RxConfig
hack for the 8168evl.") regarding AMD IOMMU errors.

RTL_GIGA_MAC_VER_36 - 8168f as well - has not been reported to behave the
same.
Tested-by: NDavid R <david@unsolicited.net>
Tested-by: NFrédéric Leroy <fredo@starox.org>
Cc: Hayes Wang <hayeswang@realtek.com>
Signed-off-by: NFrancois Romieu <romieu@fr.zoreil.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>