ABI: sysfs-class-hwmon: add a description for tempY_crit_alarm

Such ABI symbol is currently not described. Document it.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Link: https://lore.kernel.org/r/a14f98e1b23ea14cf14da3c3169955343ec28bbe.1632994837.git.mchehab+huawei@kernel.org


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>