arch/io.h: Fix PCI and PNP simple typedefs

Provide clean separation for PCI and PNP headers,
followup will also move PNP outside <arch/io.h>.

Change-Id: I85db254d50f18ea34a5e95bc517eac4085a5fafa
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/31690
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>

src/include/device/pci_ehci.h

@@ -17,8 +17,8 @@
 #ifndef _PCI_EHCI_H_
 #define _PCI_EHCI_H_
 
-#include <arch/io.h>
 #include <device/device.h>
+#include <device/pci_type.h>
 
 #define EHCI_BAR_INDEX		0x10
 #define PCI_EHCI_CLASSCODE	0x0c0320  /* USB2.0 with EHCI controller */