x86/pci: Changing subsystem init for visws

I don't know, if this new code boots, but at least it
compiles. Someone should really test it.

Signed-off-by: Robert Richter <robert.richter@amd.com>
Cc: Robert Richter <robert.richter@amd.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>