Merge remote-tracking branch 'remotes/dg-gitlab/tags/ppc-for-6.0-20210310' into staging

Merge remote-tracking branch 'remotes/dg-gitlab/tags/ppc-for-6.0-20210310' into staging

ppc patch queue for 2021-03-10

Next batch of patches for the ppc target and machine types.  Includes:
 * Several cleanups for sm501 from Peter Maydell
 * An update to the SLOF guest firmware
 * Improved handling of hotplug failures in spapr, associated cleanups
   to the hotplug handling code
 * Several etsec fixes and cleanups from Bin Meng
 * Assorted other fixes and cleanups

# gpg: Signature made Wed 10 Mar 2021 04:08:53 GMT
# gpg:                using RSA key 75F46586AE61A66CC44E87DC6C38CACA20D9B392
# gpg: Good signature from "David Gibson <david@gibson.dropbear.id.au>" [full]
# gpg:                 aka "David Gibson (Red Hat) <dgibson@redhat.com>" [full]
# gpg:                 aka "David Gibson (ozlabs.org) <dgibson@ozlabs.org>" [full]
# gpg:                 aka "David Gibson (kernel.org) <dwg@kernel.org>" [unknown]
# Primary key fingerprint: 75F4 6586 AE61 A66C C44E  87DC 6C38 CACA 20D9 B392

* remotes/dg-gitlab/tags/ppc-for-6.0-20210310:
  spapr.c: send QAPI event when memory hotunplug fails
  spapr.c: remove duplicated assert in spapr_memory_unplug_request()
  target/ppc: fix icount support on Book-e vms accessing SPRs
  qemu_timer.c: add timer_deadline_ms() helper
  spapr_pci.c: add 'unplug already in progress' message for PCI unplug
  spapr.c: add 'unplug already in progress' message for PHB unplug
  hw/ppc: e500: Add missing <ranges> in the eTSEC node
  hw/net: fsl_etsec: Fix build error when HEX_DUMP is on
  spapr_drc.c: use DRC reconfiguration to cleanup DIMM unplug state
  spapr_drc.c: add hotunplug timeout for CPUs
  spapr_drc.c: introduce unplug_timeout_timer
  target/ppc: Fix bcdsub. emulation when result overflows
  docs/system: Extend PPC section
  spapr: rename spapr_drc_detach() to spapr_drc_unplug_request()
  spapr_drc.c: use spapr_drc_release() in isolate_physical/set_unusable
  pseries: Update SLOF firmware image
  spapr_drc.c: do not call spapr_drc_detach() in drc_isolate_logical()
  hw/display/sm501: Inline template header into C file
  hw/display/sm501: Expand out macros in template header
  hw/display/sm501: Remove dead code for non-32-bit RGB surfaces

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