arm64: dts: qcom: sc7180-trogdor: add "pen-insert" label for trogdor

Add a label to the "pen-insert" node in sc7180-trogdor.dtsi

Reviewed-by: Douglas Anderson <dianders@chromium.org>
Signed-off-by: Terry Hsiao <terry_hsiao@compal.corp-partner.google.com>
Link: https://lore.kernel.org/r/20201116083014.547-1-terry_hsiao@compal.corp-partner.google.com


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