Move the TPM TIS related register and flag #defines into
include/hw/acpi/tpm.h for access by the test case.

Write a test case that covers the TIS functionality.

Add the tests cases to the MAINTAINERS file.
Signed-off-by: NStefan Berger <stefanb@linux.vnet.ibm.com>
Reviewed-by: NMarc-André Lureau <marcandre.lureau@redhat.com>