Merge remote-tracking branch 'remotes/quic/tags/pull-hex-20211028' into staging

Followup to replace more tcg_const_* with tcg_constant_tl*
Fix bug to delay writes to USR until packet commit

# gpg: Signature made Thu 28 Oct 2021 08:59:24 PM PDT
# gpg:                using RSA key 7B0244FB12DE4422
# gpg: Good signature from "Taylor Simpson (Rock on) <tsimpson@quicinc.com>" [marginal]
# gpg: WARNING: This key is not certified with sufficiently trusted signatures!
# gpg:          It is not certain that the signature belongs to the owner.
# Primary key fingerprint: 3635 C788 CE62 B91F D4C5  9AB4 7B02 44FB 12DE 4422

* remotes/quic/tags/pull-hex-20211028:
  Hexagon (target/hexagon) put writes to USR into temp until commit
  Hexagon (target/hexagon) more tcg_constant_*

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