arm64: dts: qcom: sc7280: Add device tree for herobrine evoker

Add a basic device tree for the herobrine evoker board.

Signed-off-by: Sheng-Liang Pan <sheng-liang.pan@quanta.corp-partner.google.com>
Reviewed-by: Konrad Dybcio <konrad.dybcio@somainline.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20220902160845.v5.2.I7dd7a79c4cc5fe91c3feb004473feb3b34b7b2d8@changeid