Fix the issue that aes-xxx-siv algorithms failed in OpenSSL speed test

Fix the issue that aes-xxx-siv algorithms failed in OpenSSL speed test

Speed test, aes-siv related cases fail on both x86 and arm.
The return value of siv_init() causes this problem, remove
the iv check to fix it.
Verify it locally, the result is pass.

Fixes #10416

Change-Id: If1a18599f3d0f56f22a1ce4f8f114b8db0f68cca

Reviewed-by: Richard Levitte <levitte@openssl.org>
Reviewed-by: Shane Lontis <shane.lontis@oracle.com>
(Merged from https://github.com/openssl/openssl/pull/10419)