*.asl: Remove obsolete reference to TPM ASL file

*.asl: Remove obsolete reference to TPM ASL file

TPM ACPI entries are automatically generated, and the old static
TPM ASL file is obsolete. Remove the reference to this obsolete
static and empty ASL file.

Delete src/drivers/pc80/tpm/acpi/tpm.asl.

Change-Id: I6163e6d59c53117ecbbbb0a6838101abb468de36
Signed-off-by: Patrick Rudolph <siro@das-labor.org>
Reviewed-on: https://review.coreboot.org/19291
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>