libpayload/pci: Correct MASK macro names

BUG=chrome-os-partner:54563

Change-Id: I8ef1c595205fe46dd64357051eeb232e2bbbebc1
Signed-off-by: Furquan Shaikh <furquan@google.com>
Reviewed-on: https://review.coreboot.org/15270
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
diff --git a/payloads/libpayload/include/pci/pci.h b/payloads/libpayload/include/pci/pci.h
index 47d62bc3..6ce4dde 100644
--- a/payloads/libpayload/include/pci/pci.h
+++ b/payloads/libpayload/include/pci/pci.h
@@ -60,8 +60,8 @@
 #define PCI_BASE_ADDRESS_SPACE	1 // mask
 #define PCI_BASE_ADDRESS_SPACE_IO	1
 #define PCI_BASE_ADDRESS_SPACE_MEM	0
-#define PCI_BASE_ADDRESS_IO_MASK	~0xf
-#define PCI_BASE_ADDRESS_MEM_MASK	~0x3
+#define PCI_BASE_ADDRESS_MEM_MASK	~0xf
+#define PCI_BASE_ADDRESS_IO_MASK	~0x3
 
 #define PCI_ROM_ADDRESS		0x30
 #define PCI_ROM_ADDRESS1	0x38 // on bridges