Initialise driver wrappers as first step in psa_crypto_init()

This patch amends the order of initialisations performed in psa_crypto_init()
to make sure that the driver wrappers based on the PSA driver API are initialised
before anything else.

Signed-off-by: Antonio de Angelis <antonio.deangelis@arm.com>

Patch from TF-M mbedcrypto, applied using:
git am \
modules/tee/tf-m/trusted-firmware-m/lib/ext/mbedcrypto/\
0006-Initialise-driver-wrappers-as-first-step-in-psa_cryp.patch

Signed-off-by: Joakim Andersson <joakim.andersson@nordicsemi.no>

library/psa_crypto.c

@@ -6327,6 +6327,11 @@ psa_status_t psa_crypto_init( void )
     if( global_data.initialized != 0 )
         return( PSA_SUCCESS );
 
+    /* Init drivers */
+    status = psa_driver_wrapper_init( );
+    if( status != PSA_SUCCESS )
+        goto exit;
+
     /* Initialize and seed the random generator. */
     mbedtls_psa_random_init( &global_data.rng );
     global_data.rng_state = RNG_INITIALIZED;
@@ -6339,11 +6344,6 @@ psa_status_t psa_crypto_init( void )
     if( status != PSA_SUCCESS )
         goto exit;
 
-    /* Init drivers */
-    status = psa_driver_wrapper_init( );
-    if( status != PSA_SUCCESS )
-        goto exit;
-
 #if defined(PSA_CRYPTO_STORAGE_HAS_TRANSACTIONS)
     status = psa_crypto_load_transaction( );
     if( status == PSA_SUCCESS )