nb/intel/sandybridge: add and use ME stolen memory and lock bit defines

Change-Id: If4663498b10a5eedcc1aa51088b984ecc49ef23e
Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/38012
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
diff --git a/src/northbridge/intel/sandybridge/finalize.c b/src/northbridge/intel/sandybridge/finalize.c
index 60e7a74..e07c6c2 100644
--- a/src/northbridge/intel/sandybridge/finalize.c
+++ b/src/northbridge/intel/sandybridge/finalize.c
@@ -24,7 +24,7 @@
 	pci_or_config16(PCI_DEV_SNB, GGC, 1 << 0);
 	pci_or_config16(PCI_DEV_SNB, PAVPC, 1 << 2);
 	pci_or_config32(PCI_DEV_SNB, DPR, 1 << 0);
-	pci_or_config32(PCI_DEV_SNB, MESEG_MASK, 1 << 10);
+	pci_or_config32(PCI_DEV_SNB, MESEG_MASK, MELCK);
 	pci_or_config32(PCI_DEV_SNB, REMAPBASE, 1 << 0);
 	pci_or_config32(PCI_DEV_SNB, REMAPLIMIT, 1 << 0);
 	pci_or_config32(PCI_DEV_SNB, TOM, 1 << 0);