Sony ever so graciously provides GPIO line names in their downstream
kernel (though sometimes they are not 100% accurate and you can judge
that by simply looking at them and with what drivers they are used).

Add these to the common DTSI to better document the hardware.

The pin assignment for TLMM is identical on both devices. Great job!
Signed-off-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230315-topic-kumano_dts0-v2-2-0ca7fa521b86@linaro.org