e7501: Move to perdev ACPI

Change-Id: Ic8472745c2ff0c68fd63b51d1a149a11be1650e9
Signed-off-by: Vladimir Serbinenko <phcoder@gmail.com>
Reviewed-on: http://review.coreboot.org/7047
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <pgeorgi@google.com>