arm64: dts: qcom: sc7280-idp: Add device tree files for IDP2

Move all the common device tree bits for both sc7280 IDPs into a
sc7280-idp.dtsi and create 2 different dts files (sc7280-idp.dts
and sc7280-idp2.dts) in order to manage differences across the
IDP SKU1 and SKU2 Boards.
PMR735A is present on IDP board only and is not present on IDP2.

Signed-off-by: Rajendra Nayak <rnayak@codeaurora.org>
Reviewed-by: Konrad Dybcio <konrad.dybcio@somainline.org>
Link: https://lore.kernel.org/r/1628082199-17002-3-git-send-email-rnayak@codeaurora.org


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