nb/intel/sandybridge: simplify ME lock and memory enable bit write

Timeless build results in identical image for X230.

Change-Id: I36842ebd4917e96aa8aec87ba13d27bd4bf44b76
Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/37971
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Rudolph <siro@das-labor.org>
diff --git a/src/northbridge/intel/sandybridge/raminit_common.c b/src/northbridge/intel/sandybridge/raminit_common.c
index 8f58dcb..b12ea25 100644
--- a/src/northbridge/intel/sandybridge/raminit_common.c
+++ b/src/northbridge/intel/sandybridge/raminit_common.c
@@ -608,9 +608,8 @@
 		reg = pci_read_config32(PCI_DEV(0, 0, 0), MEMASK);
 		val = (0x80000 - me_uma_size) & 0xfff;
 		reg = (reg & ~0xfff00000) | (val << 20);
-		reg = (reg & ~0x400) | (1 << 10);	// set lockbit on ME mem
-
-		reg = (reg & ~0x800) | (1 << 11);	// set ME memory enable
+		reg = reg | (1 << 10);	// set lockbit on ME mem
+		reg = reg | (1 << 11);	// set ME memory enable
 		printk(BIOS_DEBUG, "PCI(0, 0, 0)[%x] = %x\n", MEMASK, reg);
 		pci_write_config32(PCI_DEV(0, 0, 0), MEMASK, reg);
 	}