Enable LPC decoding for 1 MB more addresss, for supporting SST49LF00xA/B

Corresponding to flashrom svn r28 and coreboot v2 svn r1813.
diff --git a/flash_enable.c b/flash_enable.c
index 7bb20c4..6a78434 100644
--- a/flash_enable.c
+++ b/flash_enable.c
@@ -224,10 +224,9 @@
 	 * that it is hard to argue that we should quit at this point. 
 	 */
 
-	//dump_pci_device(dev); 
-
+	/* enable decoding at 0xffb00000 to 0xffffffff */
 	old = pci_read_byte(dev, 0x43);
-	new = old | 0x80;
+	new = old | 0xC0;
 	if (new != old) {
 		pci_write_byte(dev, 0x43, new);
 		if (pci_read_byte(dev, 0x43) != new) {