Removes mode param from mbedtls_rsa_pkcs1_sign

Commit removes the mode parameter from
mbedtls_rsa_pkcs1_sign and progagates the
change to all relevant parts of the codebase.

Signed-off-by: Thomas Daubney <thomas.daubney@arm.com>
diff --git a/tests/suites/test_suite_pkcs1_v21.function b/tests/suites/test_suite_pkcs1_v21.function
index 623f7bc..e64f222 100644
--- a/tests/suites/test_suite_pkcs1_v21.function
+++ b/tests/suites/test_suite_pkcs1_v21.function
@@ -148,8 +148,8 @@
     if (fixed_salt_length == MBEDTLS_RSA_SALT_LEN_ANY)
     {
         TEST_ASSERT( mbedtls_rsa_pkcs1_sign( &ctx, &mbedtls_test_rnd_buffer_rand,
-                                             &info, MBEDTLS_RSA_PRIVATE, digest, 0,
-                                             hash_result, output ) == result );
+                                             &info, digest, 0,hash_result,
+                                             output ) == result );
         if( result == 0 )
         {
             ASSERT_COMPARE( output, ctx.len, result_str->x, result_str->len );