move bus (PCI, PCMCIA, EISA, rapdio) config to drivers/ v2

[Christoph Hellwig]

On Fri, Oct 19, 2018 at 09:07:51AM +0200, Geert Uytterhoeven wrote:
> Without this:
>   - It's hard to visually match your untagged cover letter with the
> actual patches,
>   - Your individual patches lack the version info, so people cannot see which
>     version review comments in an email reply apply to.

All of that is trivially solved by mail threading.