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 694fa1b..1a7ceaf 160000
--- a/tf-psa-crypto
+++ b/tf-psa-crypto
@@ -1 +1 @@
-Subproject commit 694fa1b81cce46e8e160c8bda1a700f8c2a68586
+Subproject commit 1a7ceaf8e28e6b2a48f3743ce706a339dabeb509