Merge remote-tracking branch 'remotes/dg-gitlab/tags/ppc-for-6.0-20210119' into staging

Merge remote-tracking branch 'remotes/dg-gitlab/tags/ppc-for-6.0-20210119' into staging

ppc patch queue 2021-01-19

Next pull request for qemu-6.0.  Not a huge amount here, but it does
have some important fixes from Greg Kurz.  Includes:

 * A number of minor cleanups from Daniel Barboza (preliminaries for
   some hotplug changes that are still under review)
 * Improved handling of memory hotplug from Greg Kurz
 * A number of fixes for sam460ex and other 440 based platforms from
   Zolan Balaton
 * Some fixes for the QOMification of the PPC 4xx UIC interrupt
   controller from Peter Maydell

# gpg: Signature made Tue 19 Jan 2021 06:22:45 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-6.0-20210119:
  spapr_cpu_core.c: use g_auto* in spapr_create_vcpu()
  spapr_rtas.c: fix identation of rtas_ibm_suspend_me() args
  spapr_hcall.c: make do_client_architecture_support static
  spapr.h: fix trailing whitespace in phb_placement
  spapr: Improve handling of memory unplug with old guests
  sam460ex: Use type cast macro instead of simple cast
  Revert "ppc4xx: Move common dependency on serial to common option"
  Revert "sam460ex: Remove FDT_PPC dependency from KConfig"
  hw/ppc: Remove unused ppcuic_init()
  hw/ppc/ppc405_uc: Drop use of ppcuic_init()
  hw/intc/ppc-uic: Make default dcr-base 0xc0, not 0x30
  hw/ppc: Delete unused ppc405cr_init() code
  hw/ppc/sam460ex: Drop use of ppcuic_init()

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