AMD: Move RAMBASE and RAMTOP

There are no reasons to not load ramstage @ 0x100000.

Boards with HAVE_ACPI_RESUME enabled have performance penalty in using
excessive RAMTOP. For these boards, this change releases 11 MiB of RAM from CBMEM allocation to OS.

Change-Id: Ib71995aba5e9332d0ec1626b3eb3b4ef6a506d1c
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: http://review.coreboot.org/7094
Tested-by: build bot (Jenkins)
Reviewed-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>

src/northbridge/amd/amdfam10/Kconfig

@@ -54,6 +54,15 @@ config MMCONF_BUS_NUMBER
 	int
 	default 256
 
+# TODO: Reservation for heap seems excessive
+config HEAP_SIZE
+	hex
+	default 0xc0000
+
+config RAMTOP
+	hex
+	default 0x400000
+
 config BOOTBLOCK_NORTHBRIDGE_INIT
         string
         default "northbridge/amd/amdfam10/bootblock.c"