loader: fallback to kernel name, if PCI fails
Currently, if the PCI machinery fails, we return a NULL driver name.
In the past this has resulted in various workarounds.
To avoid those, fallback to loader_get_kernel_driver_name(). It's not
perfect, yet perfectly reasonable.
Signed-off-by: Emil Velikov <emil.velikov@collabora.com>
Reviewed-by: Adam Jackson <ajax@redhat.com>
Reviewed-by: Eric Engestrom <eric@engestrom.ch>
Tested-by: Marge Bot <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4084>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4084>