arm64: dts: qcom: sm[68]350: Use interrupts-extended with pdc interrupts

Using interrupts = <&pdc X Y> makes the interrupt framework interpret this as
the &pdc-nth range of the main interrupt controller (GIC). Fix it.

Signed-off-by: Konrad Dybcio <konrad.dybcio@somainline.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20211114012755.112226-5-konrad.dybcio@somainline.org