RELOCATABLE_RAMSTAGE: Fix weak symbols with ramstage_cache

We had NULL reference with cache_loaded_ramstage() if
CACHE_RELOCATED_RAMSTAGE_OUTSIDE_CBMEM was not set so boot never
proceeded to ramstage.

Cache implementation outside CBMEM provides means for platform-specific
location so there is no need of weak attributes here.

Change-Id: I1eb1a713896395c424fde23252c374f9065fe74d
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: http://review.coreboot.org/7954
Tested-by: build bot (Jenkins)
Reviewed-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>

src/include/cbfs.h

@@ -92,13 +92,11 @@ struct cbmem_entry;
  * structure to store information, but note that the handoff variable can be
  * NULL. The ramstage cbmem_entry represents the region occupied by the loaded
  * ramstage. */
-void __attribute__((weak))
-cache_loaded_ramstage(struct romstage_handoff *handoff,
+void cache_loaded_ramstage(struct romstage_handoff *handoff,
                       const struct cbmem_entry *ramstage, void *entry_point);
 /* Return NULL on error or entry point on success. The ramstage cbmem_entry is
  * the region where to load the cached contents to. */
-void * __attribute__((weak))
-load_cached_ramstage(struct romstage_handoff *handoff,
+void * load_cached_ramstage(struct romstage_handoff *handoff,
                      const struct cbmem_entry *ramstage);
 #else  /* CONFIG_RELOCATABLE_RAMSTAGE */