PCI: consolidate PCI config entry in drivers/pci

PCI: consolidate PCI config entry in drivers/pci

There is no good reason to duplicate the PCI menu in every architecture.
Instead provide a selectable HAVE_PCI symbol that indicates availability
of PCI support, and a FORCE_PCI symbol to for PCI on and the handle the
rest in drivers/pci.

Signed-off-by: Christoph Hellwig <[email protected]>
Reviewed-by: Palmer Dabbelt <[email protected]>
Acked-by: Max Filippov <[email protected]>
Acked-by: Thomas Gleixner <[email protected]>
Acked-by: Bjorn Helgaas <[email protected]>
Acked-by: Geert Uytterhoeven <[email protected]>
Acked-by: Paul Burton <[email protected]>
Signed-off-by: Masahiro Yamada <[email protected]>