Merge remote-tracking branch 'remotes/pmaydell/tags/pull-target-arm-20200123-4' into...

target-arm queue:
 * fix bug in PAuth emulation
 * add PMU to Cortex-R5, Cortex-R5F
 * qemu-nbd: Convert documentation to rST
 * qemu-block-drivers: Convert documentation to rST
 * Fix Exynos4210 UART DMA support
 * Various minor code cleanups

# gpg: Signature made Thu 23 Jan 2020 16:35:38 GMT
# 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-20200123-4:
  hw/arm/exynos4210: Connect serial port DMA busy signals with pl330
  hw/char/exynos4210_uart: Add receive DMA support
  hw/char/exynos4210_uart: Implement Rx FIFO level triggers and timeouts
  hw/char/exynos4210_uart: Implement post_load function
  hw/char/exynos4210_uart: Convert to support tracing
  hw/arm/exynos4210: Fix DMA initialization
  hw/core/or-irq: Increase limit of or-lines to 48
  dma/pl330: Convert to support tracing
  hw/misc/stm32f4xx_syscfg: Fix copy/paste error
  target/arm/arch_dump: Add SVE notes
  qemu-block-drivers: Convert to rST
  docs: Create stub system manual
  qemu-nbd: Convert invocation documentation to rST
  hw/arm: Use helper function to trigger hotplug handler plug
  hw/acpi: Remove extra indent in ACPI GED hotplug cb
  tests/tcg/aarch64: Add pauth-4
  tests/tcg/aarch64: Add pauth-3
  tests/tcg/aarch64: Fix compilation parameters for pauth-%
  target/arm: Fix PAuth sbox functions
  target/arm: add PMU feature to cortex-r5 and cortex-r5f

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