tf-psa-crypto: update reference

Signed-off-by: Valerio Setti <valerio.setti@nordicsemi.no>
diff --git a/tf-psa-crypto b/tf-psa-crypto
index dcbe6fc..67995d5 160000
--- a/tf-psa-crypto
+++ b/tf-psa-crypto
@@ -1 +1 @@
-Subproject commit dcbe6fc1da160e17ffa6ad8d2f503e13d7f505ff
+Subproject commit 67995d5def986d60fc81d85f5b3965e8f660e2e9