crypto: vmx - Improved AES/XTS performance of 6-way unrolling for ppc

JIRA: https://issues.redhat.com/browse/RHEL-52758

commit 6b36daf
Author: Danny Tsen <dtsen@linux.ibm.com>
Date:   Wed Aug 30 09:49:11 2023 -0400

    crypto: vmx - Improved AES/XTS performance of 6-way unrolling for ppc

    Improve AES/XTS performance of 6-way unrolling for PowerPC up
    to 17% with tcrypt.  This is done by using one instruction,
    vpermxor, to replace xor and vsldoi.

    The same changes were applied to OpenSSL code and a pull request was
    submitted.

    This patch has been tested with the kernel crypto module tcrypt.ko and
    has passed the selftest.  The patch is also tested with
    CONFIG_CRYPTO_MANAGER_EXTRA_TESTS enabled.

    Signed-off-by: Danny Tsen <dtsen@linux.ibm.com>
    Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

Signed-off-by: Mamatha Inamdar <minamdar@redhat.com>

Author: Mamatha Inamdar