arm64: dts: qcom: sc7280: Add RSC and PDC devices

Add PDC interrupt controller along with apps RSC device.
Also add reserved memory for command_db.

Signed-off-by: Maulik Shah <mkshah@codeaurora.org>
Signed-off-by: Rajendra Nayak <rnayak@codeaurora.org>
Link: https://lore.kernel.org/r/1615461961-17716-6-git-send-email-rnayak@codeaurora.org


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