psa: cipher: Move to driver operation context application allocation

Signed-off-by: Ronald Cron <ronald.cron@arm.com>

include/psa/crypto_driver_contexts.h

@@ -31,6 +31,7 @@
 
 /* Include the context structure definitions for the Mbed TLS software drivers */
 #include "psa/crypto_builtin_hash.h"
+#include "psa/crypto_builtin_cipher.h"
 
 /* Define the context to be used for an operation that is executed through the
  * PSA Driver wrapper layer as the union of all possible driver's contexts.
@@ -47,5 +48,17 @@ typedef union {
 #endif
 } psa_driver_hash_context_t;
 
+typedef union {
+    unsigned dummy; /* Make sure this structure is always non-empty */
+    mbedtls_psa_cipher_operation_t mbedtls_ctx;
+#if defined(PSA_CRYPTO_DRIVER_TEST)
+    mbedtls_transparent_test_driver_cipher_operation_t
+        transparent_test_driver_ctx;
+
+    mbedtls_opaque_test_driver_cipher_operation_t
+        opaque_test_driver_ctx;
+#endif
+} psa_driver_cipher_context_t;
+
 #endif /* PSA_CRYPTO_DRIVER_CONTEXTS_H */
 /* End of automatically generated file. */