This is the only place where we don't check whether
primaryBus.id.plat->pdev is not NULL before accessing its members.
It may be NULL in cases we fail to parse the busid in
config_udev_odev_setup_attribs() (see also [1], [2]) such as when udev
does not give use ID_PATH. This in turn leads to
platform_find_pci_info() being not called and pdev being NULL in one of
the items within the xf86_platform_devices array. For this to cause a
crash we only need it to become the primaryBus device.
[1]: https://gitlab.freedesktop.org/xorg/xserver/-/issues/993
[2]: https://gitlab.freedesktop.org/xorg/xserver/-/issues/1076
Signed-off-by: Povilas Kanapickas <povilas@radix.lt>
303763941f