Merge remote-tracking branch 'remotes/pmaydell/tags/pull-target-arm-20200330' into staging

target-arm queue:
 * hw/arm/orangepi: check for potential NULL pointer when calling blk_is_available
 * hw/misc/allwinner-h3-dramc: enforce 64-bit multiply when calculating row mirror address
 * docs/conf.py: Raise ConfigError for bad Sphinx Python version
 * hw/arm/xlnx-zynqmp.c: Avoid memory leak in error-return path
 * hw/arm/xlnx-zynqmp.c: Add missing error-propagation code
 * target/arm: fix incorrect current EL bug in aarch32 exception emulation

# gpg: Signature made Mon 30 Mar 2020 14:36:02 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-20200330:
  target/arm: fix incorrect current EL bug in aarch32 exception emulation
  hw/arm/xlnx-zynqmp.c: Add missing error-propagation code
  hw/arm/xlnx-zynqmp.c: Avoid memory leak in error-return path
  docs/conf.py: Raise ConfigError for bad Sphinx Python version
  hw/misc/allwinner-h3-dramc: enforce 64-bit multiply when calculating row mirror address
  hw/arm/orangepi: check for potential NULL pointer when calling blk_is_available

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