arm64: dts: qcom: sc7180: Add kingoftown dts files

Kingoftown is a trogdor-based board. These dts files are unchanged copies
from the downstream Chrome OS 5.4 kernel.

Signed-off-by: Joseph S. Barrera III <joebar@chromium.org>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Tested-by: Douglas Anderson <dianders@chromium.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20220625183538.v14.5.Ib62291487a664a65066d18a3e83c5428a6d2cc6c@changeid