Merge tag 'pull-error-2026-01-07-v2' of https://repo.or.cz/qemu/armbru into staging

Error reporting patches for 2026-01-07

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# gpg: Signature made Thu 08 Jan 2026 05:51:40 PM AEDT
# gpg:                using RSA key 354BC8B3D7EB2A6B68674E5F3870B400EB918653
# gpg:                issuer "armbru@redhat.com"
# gpg: Good signature from "Markus Armbruster <armbru@redhat.com>" [unknown]
# gpg:                 aka "Markus Armbruster <armbru@pond.sub.org>" [unknown]
# gpg: WARNING: The key's User ID is not certified with a trusted signature!
# gpg:          There is no indication that the signature belongs to the owner.
# Primary key fingerprint: 354B C8B3 D7EB 2A6B 6867  4E5F 3870 B400 EB91 8653

* tag 'pull-error-2026-01-07-v2' of https://repo.or.cz/qemu/armbru:
  block/file-win32: Improve an error message
  qga/commands-win32: Use error_setg_win32() for better error messages
  error: Use error_setg_errno() for simplicity and consistency
  error: Use error_setg_errno() to improve error messages
  net/slirp: Improve file open error message
  error: Use error_setg_file_open() for simplicity and consistency
  blkdebug: Use error_setg_file_open() for a better error message
  net/tap: Use error_setg_file_open() for a better error message
  qga: Use error_setg_file_open() for better error messages
  tap-solaris: Use error_setg_file_open() for better error messages
  ui: Convert to qemu_create() for simplicity and consistency
  error: Strip trailing '\n' from error string arguments (again)
  error: Consistently name Error * objects err, and not errp
  error: error_free(NULL) is safe, drop unnecessary conditionals
  nbd/client-connection: Replace error_propagate() by assignment
  hw/nvram/xlnx-bbram: More idiomatic and simpler error reporting
  hw/core/loader: Make load_elf_hdr() return bool, simplify caller

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

diff --cc hw/ppc/spapr.c
Simple merge