cpu/amd/agesa/s3_resume.c: Specify include paths from AGESA_ROOT

NOTFORMERGE

Include AGESA files with a path relative to AGESA_ROOT, following the
same reasoning as in commit
<HASH HERE> southbridge/amd/agesa/hudson: Clean up AGESA #includes

Change-Id: If15c4cbfd42e0264264fdb3e8c426a47609ad41f
signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>