arm64: dts: qcom: msm8994-octagon: Add gpio-keys and Hall sensor

This enables tje hardware keys as well as the Hall sensor.

Signed-off-by: Gustave Monce <gustave.monce@outlook.com>
Signed-off-by: Konrad Dybcio <konrad.dybcio@somainline.org>
Link: https://lore.kernel.org/r/20210131013853.55810-8-konrad.dybcio@somainline.org


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