Pull ACPI fix from Rafael Wysocki:
"This fixes a possible memory leak in an error code path in one of the
utility routines (Xiongfeng Wang)"
* tag 'acpi-fix-4.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
ACPI / utils: Fix memory leak in acpi_evaluate_reference() error path