CBMEM: Tidy up CAR migration

Move the  CAR migration call to arch -specific part of CBMEM init,
it is truly a x86 specific thing.

Change-Id: I715417e54f197b8745e0670d6b900a5660178141
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: http://review.coreboot.org/7860
Reviewed-by: Aaron Durbin <adurbin@google.com>
Tested-by: build bot (Jenkins)
diff --git a/src/arch/x86/Kconfig b/src/arch/x86/Kconfig
index edbc67a..dfb91fa 100644
--- a/src/arch/x86/Kconfig
+++ b/src/arch/x86/Kconfig
@@ -51,6 +51,21 @@
 	bool
 	default n
 
+config BROKEN_CAR_MIGRATE
+	def_bool n
+	help
+	  Many boards use CAR_GLOBAL but have no EARLY_CBMEM_INIT and
+	  manage CAR migration on S3 resume path only. Couple boards use
+	  CAR_GLOBAL and never do CAR migration.
+
+config LATE_CBMEM_INIT
+	def_bool n
+	select BROKEN_CAR_MIGRATE
+	help
+	  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 PC80_SYSTEM
 	bool
 	default y if ARCH_X86