payload loading: remove passing of struct payload

There's no need to keep track of struct payload within
the boot state machine. It is completely contained within
the payload loader module.

Change-Id: I16fcecf43d7fb41fc311955fdb82eabbd5c96b11
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: http://review.coreboot.org/8836
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>

src/include/program_loading.h

@@ -104,14 +104,11 @@ struct payload {
 	void *entry;
 };
 
-/*
- * Load payload into memory and return pointer to payload structure. Returns
- * NULL on error.
- */
-struct payload *payload_load(void);
+/* Load payload into memory in preparation to run. */
+void payload_load(void);
 
 /* Run the loaded payload. */
-void payload_run(const struct payload *payload);
+void payload_run(void);
 
 /* Mirror the payload to be loaded. */
 void mirror_payload(struct payload *payload);