arm64: dts: qcom: sdm845-mtp: correct ADC settle time

The PMIC's VADC property for settle time is qcom,hw-settle-time, not
qcom,hw-settle-time-us.  The latter is used in PMIC's TM ADC.

  qcom/sdm845-mtp.dtb: pmic@0: adc@3100:adc-chan@4c: 'qcom,hw-settle-time-us' does not match any of the regexes: 'pinctrl-[0-9]+'

Fixes: d5e12f38 ("arm64: dts: qcom: sdm845: mtp: Add vadc channels and thermal zones")
Cc: <stable@vger.kernel.org>
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Stephen Boyd <sboyd@kernel.org>
Reviewed-by: Vinod Koul <vkoul@kernel.org>
Reviewed-by: David Heidelberg <david@ixit.cz>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20220828084341.112146-13-krzysztof.kozlowski@linaro.org