AMD PI: remove unuseful ACPI code

sata.asl and superio.asl are empty files. Remove them.

Change-Id: Icd3e990aa713281e46dcbd8e0847166c77656b1c
Signed-off-by: WANG Siyuan <wangsiyuanbuaa@gmail.com>
Signed-off-by: WANG Siyuan <SiYuan.Wang@amd.com>
Reviewed-on: http://review.coreboot.org/10505
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
6 files changed