Hello everybody,

As per title, setpci.mod's setpci command can read/write up to 0xFF
registers but returns an incorrect (0xFF) value for any registers beyond
0xFF.. There is a 4K PCIe configuration space (0xFFF) per device.

eg:
setpci -s 0:1f.0 0xf0.l -> returns correct value
setpci -s 0:1f.0 0x200.l -> returns 0xff (incorrect)

Extending setpci.mod in this way would bring it's functionality in line
with EFI Shells 'mm' command that can read/write all 4K PCIe registers, as
well as pciutils' setpci command that can do the same.

Thank you
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