Merge remote-tracking branch 'remotes/rth/tags/pull-axp-20211013' into staging

Cleanup alpha memory ops prior to prctl PR_SET_UNALIGN

# gpg: Signature made Wed 13 Oct 2021 10:34:10 AM PDT
# gpg:                using RSA key 7A481E78868B4DB6A85A05C064DF38E8AF7E215F
# gpg:                issuer "richard.henderson@linaro.org"
# gpg: Good signature from "Richard Henderson <richard.henderson@linaro.org>" [ultimate]

* remotes/rth/tags/pull-axp-20211013:
  target/alpha: Reorg integer memory operations
  target/alpha: Reorg fp memory operations

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>