PCI/AER: Descope pci_printk() to aer_printk()

PCI/AER: Descope pci_printk() to aer_printk()

include/linux/pci.h provides low-level pci_printk() interface that is
only used by AER because it needs to print the same message with
different levels depending on the error severity. No other PCI code
uses that functionality and calls pci_<level>() logging functions
directly with the appropriate level.

Descope pci_printk() into AER as aer_printk().

Link: https://lore.kernel.org/r/20241216161012.1774-5-ilpo.jarvinen@linux.intel.com
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
[bhelgaas: retain pci_printk() for now since shpchp still uses it and I
moved those patches to a different branch]
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>