coreboot: introduce arch_payload_run()

The selfboot() function relied on global variables
within the selfboot.c compilation unit. Now that the
bounce buffer is a part of struct payload use a new
architecture-specific arch_payload_run() function
for jumping to the payload. selfboot() can then be
removed.

Change-Id: Icec74942e94599542148561b3311ce5096ac5ea5
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: http://review.coreboot.org/5300
Tested-by: build bot (Jenkins)
Reviewed-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>

src/lib/selfboot.c

@@ -19,7 +19,6 @@
  */
 
 #include <arch/byteorder.h>
-#include <arch/stages.h>
 #include <console/console.h>
 #include <cpu/cpu.h>
 #include <boot/coreboot_tables.h>
@@ -526,9 +525,3 @@ void *selfload(struct lb_memory *mem, struct payload *payload)
 out:
 	return NULL;
 }
-
-void selfboot(void *entry)
-{
-	/* Jump to kernel */
-	jmp_to_elf_entry(entry, bounce_buffer, bounce_size);
-}