arm64: dts: qcom: msm8916-samsung-a3u: add nodes for touchscreen

This patch wires up touchscreen support on Samsung Galaxy A3 2015.

Reviewed-by: Stephan Gerhold <stephan@gerhold.net>
Signed-off-by: Michael Srba <Michael.Srba@seznam.cz>
Link: https://lore.kernel.org/r/20201115195058.27097-1-michael.srba@seznam.cz


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