cc3xx: don't check if the builtin key is valid

The KMU key ID validity is checked by cc3xx_aes_external_key_loader.c,
thus it's redundant to have additional checks which complicates the
opaque key flow.

Change-Id: I22c5cf4385c0d6c75ec81045f5865076618e2b18
Signed-off-by: Amjad Ouled-Ameur <amjad.ouled-ameur@arm.com>

Author: amjoul01

platform/ext/target/arm/drivers/cc3xx/psa_driver_api/src/cc3xx_internal_cipher.c

@@ -66,10 +66,6 @@ static psa_status_t cc3xx_internal_aes_setup(
 #ifdef CC3XX_CRYPTO_OPAQUE_KEYS
     if (CC3XX_IS_OPAQUE_KEY(attributes)) {
         key_id = (cc3xx_aes_key_id_t)(((uint32_t *)key_buffer)[0]);
-
-        if (CC3XX_IS_OPAQUE_KEY_INVALID(key_id)) {
-            return PSA_ERROR_INVALID_ARGUMENT;
-        }
     }
 #endif /* CC3XX_CRYPTO_OPAQUE_KEYS */
 

platform/ext/target/arm/drivers/cc3xx/psa_driver_api/src/cc3xx_psa_mac.c

@@ -54,10 +54,6 @@ static psa_status_t cmac_compute(const psa_key_attributes_t *attributes,
 #ifdef CC3XX_CRYPTO_OPAQUE_KEYS
     if (CC3XX_IS_OPAQUE_KEY(attributes)) {
         key_id = (cc3xx_aes_key_id_t)(((uint32_t *)key_buffer)[0]);
-
-        if (CC3XX_IS_OPAQUE_KEY_INVALID(key_id)) {
-            return PSA_ERROR_INVALID_ARGUMENT;
-        }
     }
 #endif /* CC3XX_CRYPTO_OPAQUE_KEYS */
 
@@ -117,10 +113,6 @@ static psa_status_t cmac_setup(struct cc3xx_aes_state_t *state,
 #ifdef CC3XX_CRYPTO_OPAQUE_KEYS
     if (CC3XX_IS_OPAQUE_KEY(attributes)) {
         key_id = (cc3xx_aes_key_id_t)(((uint32_t *)key_buffer)[0]);
-
-        if (CC3XX_IS_OPAQUE_KEY_INVALID(key_id)) {
-            return PSA_ERROR_INVALID_ARGUMENT;
-        }
     }
 #endif /* CC3XX_CRYPTO_OPAQUE_KEYS */