AGESA: Move heap allocator declarations

Definitions are not part of ACPI S3 feature, nor do
they require any AGESA headers so move them to a
better location.

Change-Id: I9269e9d65463463d9b8280936cf90ef76711ed4f
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/18616
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Marc Jones <marc@marcjonesconsulting.com>

src/cpu/amd/agesa/heapmanager.c

@@ -17,7 +17,7 @@
 #include "heapManager.h"
 
 #include <cbmem.h>
-#include <cpu/amd/agesa/s3_resume.h>
+#include <northbridge/amd/agesa/agesa_helper.h>
 #include <northbridge/amd/agesa/BiosCallOuts.h>
 
 #include <arch/acpi.h>