ACPI: processor: Fix previous acpi_processor_errata_piix4() fix

In the Linux kernel, the following vulnerability has been resolved:

ACPI: processor: Fix previous acpi_processor_errata_piix4() fix

After commi f132e089fe89 ("ACPI: processor: Fix NULL-pointer dereference

in acpi_processor_errata_piix4()"), device pointers may be dereferenced

after dropping references to the device objects pointed to by them,

which may cause a use-after-free to occur.

Moreover, debug messages about enabling the errata may be printed

if the errata flags corresponding to them are unset.

Address all of these issues by moving message printing to the points

in the code where the errata flags are set.