CBMEM console: Fix CAR migration step

With the change it becomes irrelevant if memcpy() car.global_data or
cbmemc_reinit() is done first.

Change-Id: Ie479eef346c959e97dcc55861ccb0db1321fb7b2
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: http://review.coreboot.org/8032
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@google.com>
Tested-by: build bot (Jenkins)

src/lib/cbmem_console.c

@@ -65,7 +65,7 @@ static u8 static_console[STATIC_CONSOLE_SIZE];
 
 static inline struct cbmem_console *current_console(void)
 {
-	return car_get_var(cbmem_console_p);
+	return car_sync_var(cbmem_console_p);
 }
 
 static inline void current_console_set(struct cbmem_console *new_console_p)