thermal/drivers/qcom/spmi-adc-tm5: Add support for HC variant

The variant of the ADC Thermal Monitor block found in e.g. PM8998 is
"HC", add support for this variant to the ADC TM5 driver in order to
support using VADC channels as thermal_zones on SDM845 et al.

Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/20211005032531.2251928-3-bjorn.andersson@linaro.org
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>