Correction of failing ecdsa & pk tests

Signed-off-by: TRodziewicz <tomasz.rodziewicz@mobica.com>
diff --git a/tests/suites/test_suite_pk.function b/tests/suites/test_suite_pk.function
index bc469b6..612796b 100644
--- a/tests/suites/test_suite_pk.function
+++ b/tests/suites/test_suite_pk.function
@@ -821,7 +821,8 @@
     cnt_restart = 0;
     do {
         ret = mbedtls_pk_sign_restartable( &prv, md_alg, hash, hlen,
-                                            sig, &slen, NULL, NULL, &rs_ctx );
+                                            sig, &slen, mbedtls_test_rnd_std_rand, 
+                                            NULL, &rs_ctx );
     } while( ret == MBEDTLS_ERR_ECP_IN_PROGRESS && ++cnt_restart );
 
     TEST_ASSERT( ret == 0 );
@@ -868,7 +869,8 @@
 
         slen = sizeof( sig );
         ret = mbedtls_pk_sign_restartable( &prv, md_alg, hash, hlen,
-                                            sig, &slen, NULL, NULL, &rs_ctx );
+                                            sig, &slen, mbedtls_test_rnd_std_rand, 
+                                            NULL, &rs_ctx );
         TEST_ASSERT( ret == MBEDTLS_ERR_ECP_IN_PROGRESS );
     }