Merge remote-tracking branch 'remotes/rth-gitlab/tags/pull-misc-20210713' into staging

Merge remote-tracking branch 'remotes/rth-gitlab/tags/pull-misc-20210713' into staging

Cleanup alpha, hppa, or1k wrt tcg_constant_tl.
Implement x86 fcs:fip, fds:fdp.
Trivial x86 watchpoint cleanup.

# gpg: Signature made Tue 13 Jul 2021 17:36:29 BST
# gpg:                using RSA key 7A481E78868B4DB6A85A05C064DF38E8AF7E215F
# gpg:                issuer "[email protected]"
# gpg: Good signature from "Richard Henderson <[email protected]>" [full]
# Primary key fingerprint: 7A48 1E78 868B 4DB6 A85A  05C0 64DF 38E8 AF7E 215F

* remotes/rth-gitlab/tags/pull-misc-20210713:
  target/hppa: Clean up DisasCond
  target/hppa: Use tcg_constant_*
  target/openrisc: Use dc->zero in gen_add, gen_addc
  target/openrisc: Cache constant 0 in DisasContext
  target/openrisc: Use tcg_constant_tl for dc->R0
  target/openrisc: Use tcg_constant_*
  target/alpha: Use tcg_constant_* elsewhere
  target/alpha: Use tcg_constant_i64 for zero and lit
  target/alpha: Use dest_sink for HW_RET temporary
  target/alpha: Store set into rx flag
  target/i386: Correct implementation for FCS, FIP, FDS and FDP
  target/i386: Split out do_fninit
  target/i386: Trivial code motion and code style fix
  target/i386: Tidy hw_breakpoint_remove

Signed-off-by: Peter Maydell <[email protected]>