timestamps: clarify in ramstage when not to reinit the cache

Commit bd1499d3 fixed a bug to not re-initialize the timestamp
cache in ramstage for EARLY_CBMEM_INIT. However, EARLY_CBMEM_INIT
was not included. Therefore, add this condition. This will result
in base_time being initialized to the passed in timestamp
for !EARLY_CBMEM_INIT platforms.

Change-Id: Ia1d744b3cfd28163f3339f2364efe59f7dcb719b
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: http://review.coreboot.org/10884
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
diff --git a/src/lib/timestamp.c b/src/lib/timestamp.c
index 7ead383..ca25093 100644
--- a/src/lib/timestamp.c
+++ b/src/lib/timestamp.c
@@ -202,7 +202,7 @@
 	/* In the EARLY_CBMEM_INIT case timestamps could have already been
 	 * recovered. In those circumstances honor the cache which sits in BSS
 	 * as it has already been initialized. */
-	if (ENV_RAMSTAGE &&
+	if (ENV_RAMSTAGE && IS_ENABLED(CONFIG_EARLY_CBMEM_INIT) &&
 	    ts_cache->cache_state != TIMESTAMP_CACHE_UNINITIALIZED)
 		return;