PCI/AER: Rename struct aer_stats to aer_info

PCI/AER: Rename struct aer_stats to aer_info

Update name to reflect the broader definition of structs/variables that are
stored (e.g. ratelimits). This is a preparatory patch for adding rate limit
support.

[bhelgaas: "aer_report" -> "aer_info"]

Signed-off-by: Karolina Stolarek <karolina.stolarek@oracle.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Tested-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Reviewed-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Link: https://patch.msgid.link/20250522232339.1525671-16-helgaas@kernel.org