pci: update all users to look in pci/

update all users so we can remove the makefile hack.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
diff --git a/hw/xen_platform.c b/hw/xen_platform.c
index a54e7a2..10bb560 100644
--- a/hw/xen_platform.c
+++ b/hw/xen_platform.c
@@ -27,7 +27,7 @@
 
 #include "hw.h"
 #include "pc.h"
-#include "pci.h"
+#include "pci/pci.h"
 #include "irq.h"
 #include "xen_common.h"
 #include "net.h"