resource: add window support

Add support for resource windows.  This is for bridge resources, i.e.,
regions where a bridge forwards transactions from the primary to the
secondary side.

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Len Brown <len.brown@intel.com>
diff --git a/include/linux/ioport.h b/include/linux/ioport.h
index 510e4ac..71ab79d 100644
--- a/include/linux/ioport.h
+++ b/include/linux/ioport.h
@@ -51,6 +51,7 @@
 #define IORESOURCE_STARTALIGN	0x00080000	/* start field is alignment */
 
 #define IORESOURCE_MEM_64	0x00100000
+#define IORESOURCE_WINDOW	0x00200000	/* forwarded by bridge */
 
 #define IORESOURCE_EXCLUSIVE	0x08000000	/* Userland may not map this resource */
 #define IORESOURCE_DISABLED	0x10000000