igc NIC not detected

Hi,
   I'm trying to use an I225 based NIC (Amitosai MTS-PCIE25GLAN) on
13.1-STABLE, but it's not being attached. dmesg shows the following:

igc0: <Intel(R) Ethernet Controller I225(blankNVM)> mem
0xf5800000-0xf5ffffff,0xf6000000-0xf6003fff irq 30 at device 0.0 on pci6
igc0: The EEPROM Checksum Is Not Valid
igc0: IFDI_ATTACH_PRE failed 5
device_attach: igc0 attach returned 5

and this is the output of pciconf -lcbv

none1@pci0:6:0:0:       class=0x020000 rev=0x01 hdr=0x00 vendor=0x8086
device=0x15fd subvendor=0x8086 subdevice=0x0000
    vendor     = 'Intel Corporation'
    class      = network
    subclass   = ethernet
    bar   [10] = type Memory, range 32, base 0xf5800000, size 8388608,
enabled
    bar   [1c] = type Memory, range 32, base 0xf6000000, size 16384, enabled
    cap 01[40] = powerspec 3  supports D0 D3  current D0
    cap 05[50] = MSI supports 1 message, 64 bit, vector masks
    cap 11[70] = MSI-X supports 5 messages
                 Table in map 0x1c[0x0], PBA in map 0x1c[0x2000]
    cap 10[a0] = PCI-Express 2 endpoint max data 128(512) FLR RO NS
                 max read 512
                 link x1(x1) speed 5.0(5.0) ASPM disabled(L0s/L1)
    ecap 0001[100] = AER 2 0 fatal 0 non-fatal 1 corrected
    ecap 0003[140] = Serial 1 00a0c9ffff000000
    ecap 0018[1c0] = LTR 1
    ecap 001f[1f0] = Precision Time Measurement 1
    ecap 001e[1e0] = L1 PM Substates 1


Is this adapter supported or is there something I can do to make it work?

Thanks in advance

Mariano