Fix AES-GCM on Power 8 CPUs

Properly fallback to the default implementation on CPUs
missing necessary instructions.

Fixes #19163

Reviewed-by: Dmitry Belyavskiy <beldmit

Fix AES-GCM on Power 8 CPUs

Properly fallback to the default implementation on CPUs
missing necessary instructions.

Fixes #19163

Reviewed-by: Dmitry Belyavskiy <beldmit@gmail.com>
Reviewed-by: Paul Dale <pauli@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/19182)

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Update copyright year

Reviewed-by: Tomas Mraz <tomas@openssl.org>
Release: yes

Fixed counter overflow

Reviewed-by: Tomas Mraz <tomas@openssl.org>
Reviewed-by: Paul Dale <pauli@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/17607)

AES-GCM performance optimzation with stitched method for p9+ ppc64le

Assembly code reviewed by Shricharan Srivatsan <ssrivat@us.ibm.com>

Reviewed-by: Tomas Mraz <tomas@openssl.org>

AES-GCM performance optimzation with stitched method for p9+ ppc64le

Assembly code reviewed by Shricharan Srivatsan <ssrivat@us.ibm.com>

Reviewed-by: Tomas Mraz <tomas@openssl.org>
Reviewed-by: Paul Dale <pauli@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/16854)

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