Revert "support in more types then just RSA_KEYPAIR"

This reverts commit 7824c79.

Author: Cruz Monrreal II

components/TARGET_PSA/services/crypto/COMPONENT_PSA_SRV_IPC/psa_crypto_spm.c

@@ -1003,13 +1003,18 @@ psa_status_t psa_generate_key(psa_key_slot_t key,
     in_vec[1].base = &bits;
     in_vec[1].len = sizeof(size_t);
 
-    if (((parameters == NULL) && (parameters_size != 0)) || ((parameters != NULL) && (parameters_size == 0))) {
-        return (PSA_ERROR_INVALID_ARGUMENT);
+    /* currently the parameter argument is used only for RSA keypair
+       and ignored in other cases. support for other algorithms
+       may be added later*/
+    if (PSA_KEY_TYPE_RSA_KEYPAIR == type) {
+        in_vec[2].base = parameters;
+        /* size of parameter is unsigned integer as defined in header */
+        in_vec[2].len = parameters_size;
+    } else { // currenty ignored for non RSA case
+        in_vec[2].base = NULL;
+        in_vec[2].len = 0;
     }
 
-    in_vec[2].base = parameters;
-    in_vec[2].len = parameters_size;
-
     handle = psa_connect(PSA_KEY_MNG_ID, MINOR_VER);
     if (handle <= 0) {
         return (PSA_ERROR_COMMUNICATION_FAILURE);