Merge remote-tracking branch...

Merge remote-tracking branch 'remotes/edgar/tags/edgar/xilinx-next-2021-01-27.for-upstream' into staging

For upstream

# gpg: Signature made Wed 27 Jan 2021 07:41:20 GMT
# gpg:                using RSA key AC44FEDC14F7F1EBEDBF415129C596780F6BCA83
# gpg: Good signature from "Edgar E. Iglesias (Xilinx key) <edgar.iglesias@xilinx.com>" [unknown]
# gpg:                 aka "Edgar E. Iglesias <edgar.iglesias@gmail.com>" [full]
# Primary key fingerprint: AC44 FEDC 14F7 F1EB EDBF  4151 29C5 9678 0F6B CA83

* remotes/edgar/tags/edgar/xilinx-next-2021-01-27.for-upstream:
  target/microblaze: Add security attributes on memory transactions
  target/microblaze: use MMUAccessType instead of int in mmu_translate
  target/microblaze: Add use-non-secure property

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