Merge remote-tracking branch 'remotes/pmaydell/tags/pull-target-arm-20210718' into...

target-arm queue:
 * Remove duplicate 'plus1' function from Neon and SVE decode
 * Fix offsets for TTBCR for big-endian hosts
 * docs: fix copyright date
 * docs: add license/version info to HTML footers
 * docs: add an About section
 * docs: document some more arm boards

# gpg: Signature made Sun 18 Jul 2021 13:45:22 BST
# gpg:                using RSA key E1A5C593CD419DE28E8315CF3C2525ED14360CDE
# gpg:                issuer "peter.maydell@linaro.org"
# gpg: Good signature from "Peter Maydell <peter.maydell@linaro.org>" [ultimate]
# gpg:                 aka "Peter Maydell <pmaydell@gmail.com>" [ultimate]
# gpg:                 aka "Peter Maydell <pmaydell@chiark.greenend.org.uk>" [ultimate]
# Primary key fingerprint: E1A5 C593 CD41 9DE2 8E83  15CF 3C25 25ED 1436 0CDE

* remotes/pmaydell/tags/pull-target-arm-20210718:
  target/arm: Remove duplicate 'plus1' function from Neon and SVE decode
  docs: Add skeletal documentation of highbank and midway
  docs: Add skeletal documentation of the emcraft-sf2
  docs: Add skeletal documentation of cubieboard
  docs: Add QEMU version information to HTML footer
  docs: Add license note to the HTML page footer
  docs: Add some actual About text to about/index.rst
  docs: Move deprecation, build and license info out of system/
  docs: Remove "Contents:" lines from top-level subsections
  docs: Stop calling the top level subsections of our manual 'manuals'
  docs: Fix documentation Copyright date
  target/arm: Fix offsets for TTBCR

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