Make the log facility used to print warnings to be KERN_WARNING
explicitly, rather than rely on the current (or default) value
of the MESSAGE_LOGLEVEL_DEFAULT set in Kconfig. This will make
all the warnings in the arch/x86/pci/pcbios.c to be printed
consistently at the same log facility.
This is slightly confusing. There are only two messages that didn't
supply a log level, so the avoidance of MESSAGE_LOGLEVEL_DEFAULT
applies to those.
Might be worth doing this as well:
#define pr_fmt(fmt) "PCI: " fmt
and removing the "PCI: " prefix from the messages. This would change
the "bios32_service" output slightly, but I think the change would be
a good one.