dt-bindings: thermal: qcom: add HC variant of adc-thermal monitor bindings

The HC generation of the ADC Thermal Monitor is quite similar to the 5th
generation, but differs in valid values for a few properties. Create a
new binding for the HC version of the hardware, rather than sprinkle
conditionals throughout the existing binding.

Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20211005032531.2251928-2-bjorn.andersson@linaro.org
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>