Free psa crypto at the end of programs when initialized

Signed-off-by: Przemek Stekiel <przemyslaw.stekiel@mobica.com>
diff --git a/programs/x509/crl_app.c b/programs/x509/crl_app.c
index f45d0b8..aa2e711 100644
--- a/programs/x509/crl_app.c
+++ b/programs/x509/crl_app.c
@@ -134,6 +134,7 @@
 
 exit:
     mbedtls_x509_crl_free(&crl);
+    mbedtls_psa_crypto_free();
 
     mbedtls_exit(exit_code);
 }