Merge remote-tracking branch 'remotes/vivier2/tags/linux-user-for-6.1-pull-request...

Merge remote-tracking branch 'remotes/vivier2/tags/linux-user-for-6.1-pull-request' into staging

linux-user pull request 20210708

Code and style cleanup
Add ppid in self/stat
ELF_HWCAP for RISC-V

# gpg: Signature made Thu 08 Jul 2021 11:07:31 BST
# 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-6.1-pull-request:
  linux-user/syscall: Remove hardcoded tabs (code style)
  linux-user/alpha: Remove hardcoded tabs (code style)
  linux-user/mips: Handle TARGET_EWOULDBLOCK as TARGET_EAGAIN
  linux-user/hppa: Handle TARGET_EWOULDBLOCK as TARGET_EAGAIN
  linux-user/alpha: Handle TARGET_EWOULDBLOCK as TARGET_EAGAIN
  linux-user: Fix style problems in linuxload.c
  linux-user: fill ppid field in /proc/self/stat
  linux-user/elfload: Implement ELF_HWCAP for RISC-V

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