[Bug 235944] jedec_dimm(4) does not attach to KFA2 (aka Galax) Hall of Fame DDR4 sticks

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=235944

--- Comment #11 from Greg V <greg at unrelenting.technology> ---
(In reply to Conrad Meyer from comment #9)

This is first gen Zen (R7 1700, X370). I'm not sure what qualifies as
interesting, but here's its description:

        intsmb0 pnpinfo vendor=0x1022 device=0x790b subvendor=0x1462
subdevice=0x7a33 class=0x0c0500 at slot=20 function=0 dbsf=pci0:0:20:0
handle=\_SB_.PCI0.D028
            ACPI I/O ports:
                0xb00-0xb0f
          smbus0
            jedec_dimm0 at addr=0xa4
            jedec_dimm1 at addr=0xa6

Looks like the AMD website only has documentation for the previous (?) FCH —
https://www.amd.com/system/files/TechDocs/51205_Bolton_FCH_BIOS_Dev_Guide.pdf
mentions device ID 780b, not 790b. FreeBSD source calls 790b 'AMDCZ'.

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