arm64: dts: qcom: sm8250: camss: Define ports and ports address/size cells

Define the set of possible ports, one for each CSI PHY along with the port
address and size cells @ the SoC dtsi level.

Suggested-by: Konrad Dybcio <konrad.dybcio@somainline.org>
Suggested-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Vladimir Zapolskiy <vladimir.zapolskiy@linaro.org>
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20221117003232.589734-7-bryan.odonoghue@linaro.org