Update crypto submodule

Previously in d8752858fc22fa3ee4be21bc27e04d8fedaeaea4:
* #333: Streamline PSA key type encodings: prepare
* #323: Initialise return values to an error

Previously in dbcb44202c9b67184a72afd21c7191c17eee352e:
* #291: Test MBEDTLS_CTR_DRBG_USE_128_BIT_KEY
* #334: Fix some pylint warnings

Previously in ceceedb532a4bc9e569f02261ab841b102a8c167:
* #348: Bump version to Mbed TLS 2.20.0 and crypto SO version to 4
* #354: Fix incrementing pointer instead of value

In this commit:
* #349: Fix minor defects found by Coverity
* #179: Add option to build SHA-512 without SHA-384
* #327: Implement psa_hash_compute and psa_hash_compare
* #330: Streamline PSA key type and curve encodings
diff --git a/crypto b/crypto
index 1146b4e..819799c 160000
--- a/crypto
+++ b/crypto
@@ -1 +1 @@
-Subproject commit 1146b4e06011b69a6437e6b728f2af043a06ec19
+Subproject commit 819799cfc68e4c4381673a8a27af19802c8263f2