arm64: dts: qcom: sdm632: Add device tree for Fairphone 3

Add device tree for the Fairphone 3 smartphone which is based on
Snapdragon 632 (sdm632).

Signed-off-by: Luca Weiss <luca@z3ntu.xyz>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20220220201909.445468-11-luca@z3ntu.xyz