Merge remote-tracking branch 'remotes/shorne/tags/or1k-pull-request' into staging

OpenRISC patches

 - Add automatic DTS generation to openrisc_sim

# gpg: Signature made Sat 26 Feb 2022 01:39:55 GMT
# gpg:                using RSA key D9C47354AEF86C103A25EFF1C3B31C2D5E6627E4
# gpg: Good signature from "Stafford Horne <shorne@gmail.com>" [unknown]
# gpg: WARNING: This key is not certified with a trusted signature!
# gpg:          There is no indication that the signature belongs to the owner.
# Primary key fingerprint: D9C4 7354 AEF8 6C10 3A25  EFF1 C3B3 1C2D 5E66 27E4

* remotes/shorne/tags/or1k-pull-request:
  hw/openrisc/openrisc_sim: Add support for initrd loading
  hw/openrisc/openrisc_sim: Add automatic device tree generation
  hw/openrisc/openrisc_sim: Increase max_cpus to 4
  hw/openrisc/openrisc_sim: Use IRQ splitter when connecting UART
  hw/openrisc/openrisc_sim: Parameterize initialization
  hw/openrisc/openrisc_sim: Create machine state for or1ksim

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