CBMEM: Tag chipsets with LATE_CBMEM_INIT

In preparation to remove the static CBMEM allocator, tag the chipsets
that still do not implement get_top_of_ram() for romstage.

LATE_CBMEM_INIT also implies BROKEN_CAR_MIGRATE.

Change-Id: Iad359db2e65ac15c54ff6e9635429628e4db6fde
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: http://review.coreboot.org/7850
Reviewed-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
Reviewed-by: Aaron Durbin <adurbin@google.com>
Tested-by: build bot (Jenkins)

src/Kconfig

@@ -157,16 +157,17 @@ config INCLUDE_CONFIG_FILE
 	    (empty)                        0x8e480    null         3610440
 
 config EARLY_CBMEM_INIT
-	bool
-	default n
+	def_bool !LATE_CBMEM_INIT
+
+config LATE_CBMEM_INIT
+	def_bool n
 	help
-	  Make coreboot initialize the CBMEM structures while running in ROM
-	  stage. This is useful when the ROM stage wants to communicate
-	  some, for instance, execution timestamps. It needs support in
-	  romstage.c and should be enabled by the board's Kconfig.
+	  Enable this in chipset's Kconfig if northbridge does not implement
+	  early get_top_of_ram() call for romstage. CBMEM tables will be
+	  allocated late in ramstage, after PCI devices resources are known.
 
 config BROKEN_CAR_MIGRATE
-	def_bool !EARLY_CBMEM_INIT
+	def_bool LATE_CBMEM_INIT
 	help
 	  Many boards use CAR_GLOBAL but have no EARLY_CBMEM_INIT and
 	  manage CAR migration on S3 resume path only. Couple boards use