southbridge/amd agesa & cimx spelling fixes

Trivial fixes, but the editor highlights them, and it's easy to go
through a bunch of files while I'm otherwise idle.

Change-Id: I5d2d4ba098d2a95f7643f000f4b48b3349a8e6cf
Signed-off-by: Martin Roth <martin.roth@se-eng.com>
Reviewed-on: http://review.coreboot.org/7839
Tested-by: build bot (Jenkins)
Reviewed-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
20 files changed