APEI/ERST: Fix error message formatting
APEI/ERST: Fix error message formatting

... according to acpi/apei/ conventions. Use standard pr_fmt prefix
while at it.

Signed-off-by: Borislav Petkov <0691a664b24b6f15b20cd5aee64b72271db08be1@suse.de>
Acked-by: Bjorn Helgaas <f10ec01be0c6b54271af5c550cd257810bdf3268@google.com>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs