arm64: dts: qcom: pm8994: Add RESIN node

Add a RESIN node to support RESIN-connected buttons on some
devices.

Signed-off-by: Konrad Dybcio <konrad.dybcio@somainline.org>
Link: https://lore.kernel.org/r/20210228130831.203765-8-konrad.dybcio@somainline.org
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>