slippy/falco/peppy: update ACPI C-state settings

Since these boards do not support C10 we should not bother
advertising that state in the ACPI _CST.

Instead use this map:

ACPI(C1) = MWAIT(C1E)
ACPI(C2) = MWAIT(C3)
ACPI(C3) = MWAIT(C7S)

BUG=chrome-os-partner:21215
BRANCH=falco
TEST=manual: emerge-falco chromeos-coreboot-falco

Change-Id: I37eb02bf9555c74e957316a1ba9778eb2b6ee128
Signed-off-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/62898
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-by: Marc Jones <marc.jones@se-eng.com>
3 files changed