amd/family16kb: Move and resize the MMIO region

The Kabini MMIO region was assigned a 256MB region at
0xA0000000. That location is below TOP_MEM and is getting
carved out of useable system memory which is not being
reclaimed above 4GB. This changes its size to 64MB and
moves it to 0xF8000000.

This was tested on the hp/abm and asrock/imb-a180 boards.

Change-Id: Ib226bc954311a3a2a15f182ab4618f4924e95a5b
Signed-off-by: Dave Frodin <dave.frodin@se-eng.com>
Reviewed-on: http://review.coreboot.org/5945
Tested-by: build bot (Jenkins)
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>

src/northbridge/amd/agesa/family16kb/Kconfig

@@ -2,6 +2,7 @@
 ## This file is part of the coreboot project.
 ##
 ## Copyright (C) 2007-2009 coresystems GmbH
+## Copyright (C) 2014 Sage Electronic Engineering, LLC
 ##
 ## This program is free software; you can redistribute it and/or modify
 ## it under the terms of the GNU General Public License as published by
@@ -32,11 +33,11 @@ config HW_MEM_HOLE_SIZE_AUTO_INC
 
 config MMCONF_BASE_ADDRESS
 	hex
-	default 0xA0000000
+	default 0xF8000000
 
 config MMCONF_BUS_NUMBER
 	int
-	default 256
+	default 64
 
 config VGA_BIOS_ID
 	string