amd/agesa,cimx: Rename ACPI OS detection methods

Try to 'standardize' the otherwise peculiar method naming to be somewhat
more in-line with other ACPI implementations. This makes it easier to
compare with vendor DSDT dumps for example.

Change-Id: I5ba54f7361796669ac0cab7ff91e7de43b22e846
Signed-off-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
Reviewed-on: http://review.coreboot.org/5888
Tested-by: build bot (Jenkins)
Reviewed-by: Marc Jones <marc.jones@se-eng.com>
48 files changed