CBMEM: Always select CAR_MIGRATION

If romstage does not make cbmem_initialize() call, linker should
optimize the code for CAR migration away.

This simplifies design of CBMEM console by a considerable amount.
As console buffer is now migrated within cbmem_initialize() call there
is no longer need for cbmemc_reinit() call made at end of romstage.

Change-Id: I8675ecaafb641fa02675e9ba3f374caa8e240f1d
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: http://review.coreboot.org/3916
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@google.com>

src/include/cpu/x86/car.h

@@ -28,7 +28,7 @@
 #define CAR_CBMEM
 #endif
 
-#if CONFIG_CAR_MIGRATION && defined(__PRE_RAM__)
+#if defined(__PRE_RAM__)
 #define CAR_MIGRATE_ATTR __attribute__ ((used,section (".car.migrate")))
 
 /* Call migrate_fn_() when CAR globals are migrated. */

src/include/timestamp.h

@@ -59,13 +59,13 @@ enum timestamp_id {
 void timestamp_init(tsc_t base);
 void timestamp_add(enum timestamp_id id, tsc_t ts_time);
 void timestamp_add_now(enum timestamp_id id);
-void timestamp_sync(void);
+void timestamp_reinit(void);
 tsc_t get_initial_timestamp(void);
 #else
 #define timestamp_init(base)
 #define timestamp_add(id, time)
 #define timestamp_add_now(id)
-#define timestamp_sync()
+#define timestamp_reinit()
 #endif
 
 #endif