loading: move ramstage cache function declarations

The functions related to caching ramstage were in cbfs.h.
Now that the loading code is separate move those declarations
to the common program_loading.h.

Change-Id: Ib22ef8a9c66e1d2b53388bceb8386baa6302d28b
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: http://review.coreboot.org/8835
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>

src/lib/ramstage_cache.c

@@ -19,8 +19,8 @@
 
 #include <stddef.h>
 #include <string.h>
-#include <cbfs.h>
 #include <console/console.h>
+#include <program_loading.h>
 #include <ramstage_cache.h>
 #include <romstage_handoff.h>