htmldocs: Warning: drivers/acpi/device_pm.c references a file that doesn't exist: Documentation/firmware-guide/acpi/low-power-probe.rst

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   3cc40a443a04d52b0c95255dce264068b01e9bfe
commit: b82a7df4a7f3841896aaec1ad81e654bc87b5989 ACPI: Add a convenience function to tell a device is in D0 state
date:   10 months ago
reproduce: make htmldocs

If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <lkp@xxxxxxxxx>

All warnings (new ones prefixed by >>):

>> Warning: drivers/acpi/device_pm.c references a file that doesn't exist: Documentation/firmware-guide/acpi/low-power-probe.rst

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