PCI/AER: Reduce pci_print_aer() correctable error level to KERN_WARNING

PCI/AER: Reduce pci_print_aer() correctable error level to KERN_WARNING

Some existing logs in pci_print_aer() log with error severity by default.

Convert them to use KERN_WARNING for correctable errors and KERN_ERR for
uncorrectable errors.

[bhelgaas: commit log]

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: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Link: https://patch.msgid.link/20250522232339.1525671-15-helgaas@kernel.org