Merge remote-tracking branch 'remotes/bsdimp/tags/pull-bsd-user-20210430' into staging

Merge remote-tracking branch 'remotes/bsdimp/tags/pull-bsd-user-20210430' into staging

bsd-user: start to cleanup the mess

A number of small cleanups to get started. All the checkpatch.pl warnings for
bsdload.c have been fixed, as well as a warning from qemu.h (though more remain
and this patch series fails the format check still). I've also fixed a
compile-time warning about a missing break.

# gpg: Signature made Fri 30 Apr 2021 16:40:08 BST
# gpg:                using RSA key 2035F894B00AA3CF7CCDE1B76C1CD1287DB01100
# gpg: Good signature from "Warner Losh <wlosh@netflix.com>" [unknown]
# gpg:                 aka "Warner Losh <imp@bsdimp.com>" [unknown]
# gpg:                 aka "Warner Losh <imp@freebsd.org>" [unknown]
# gpg:                 aka "Warner Losh <imp@village.org>" [unknown]
# gpg:                 aka "Warner Losh <wlosh@bsdimp.com>" [unknown]
# gpg: WARNING: This key is not certified with a trusted signature!
# gpg:          There is no indication that the signature belongs to the owner.
# Primary key fingerprint: 2035 F894 B00A A3CF 7CCD  E1B7 6C1C D128 7DB0 1100

* remotes/bsdimp/tags/pull-bsd-user-20210430:
  bsd-user: style tweak: Put {} around all if/else/for statements
  bsd-user: put back a break; that had gone missing...
  bsd-user: style tweak: return is not a function, eliminate ()
  bsd-user: style tweak: keyword space (
  bsd-user: whitespace changes

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>