Hotfix: Fix issue of building PSA Arch tests

The patch [1] missed the change to the include path of PSA Arch
tests.
This patch updates the include path and fixes that build issue.

[1]: https://review.trustedfirmware.org/c/TF-M/tf-m-tests/+/7554

Signed-off-by: David Hu <david.hu@arm.com>
Change-Id: Ifafc60ba1477e9b22decddcf8901012b794096eb
1 file changed