target/arm: Add feature detection for FEAT_Pauth2 and extensions

target/arm: Add feature detection for FEAT_Pauth2 and extensions

Rename isar_feature_aa64_pauth_arch to isar_feature_aa64_pauth_qarma5
to distinguish the other architectural algorithm qarma3.

Add ARMPauthFeature and isar_feature_pauth_feature to cover the
other pauth conditions.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Aaron Lindsay <aaron@os.amperecomputing.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20230829232335.965414-4-richard.henderson@linaro.org
Message-Id: <20230609172324.982888-3-aaron@os.amperecomputing.com>
[rth: Add ARMPauthFeature and eliminate most other predicates]
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>