arm64: dts: qcom: msm8939-longcheer-l9100: Add proximity-near-level

Consider an object near to the sensor when their distance is about 4 cm
or below.

Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: André Apitzsch <git@apitzsch.eu>
Link: https://lore.kernel.org/r/20231126-bqm5_prox-v2-1-b7defc3979ac@apitzsch.eu


Signed-off-by: Bjorn Andersson <andersson@kernel.org>