Don't generate a MAC when using KTLS.
Don't generate a MAC when using KTLS.

The kernel will generate the MAC when transmitting the frame.  Doing
so here causes the MAC to be included as part of the plain text that
the kernel MACs and encrypts.  Note that this path is not taken when
using stitched cipher suites.

Reviewed-by: Tomas Mraz <973cc78d8b4cb00714230ba9be0225e917ab4ac6@fedoraproject.org>
Reviewed-by: Matt Caswell <1fa2ef4755a9226cb9a0a4840bd89b158ac71391@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/10045)

openssl/openssl,openssl/openssl,openssl/openssl,openssl/openssl,openssl/openssl,openssl/openssl