Some linux-user/sparc fixes
# gpg: Signature made Tue 10 Nov 2020 08:30:17 GMT
# gpg: using RSA key
CD2F75DDC8E3A4DC2E4F5173F30C38BD3F2FBE3C
# gpg: issuer "laurent@vivier.eu"
# gpg: Good signature from "Laurent Vivier <lvivier@redhat.com>" [full]
# gpg: aka "Laurent Vivier <laurent@vivier.eu>" [full]
# gpg: aka "Laurent Vivier (Red Hat) <lvivier@redhat.com>" [full]
# Primary key fingerprint: CD2F 75DD C8E3 A4DC 2E4F 5173 F30C 38BD 3F2F BE3C
* remotes/vivier2/tags/linux-user-for-5.2-pull-request:
linux-user/sparc: Don't zero high half of PC, NPC, PSR in sigreturn
linux-user/sparc: Correct set/get_context handling of fp and i7
linux-user/sparc: Fix errors in target_ucontext structures
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>