arm64: dts: qcom: sc8280xp: simplify interrupts-extended

The parent controller for both interrupts is GIC, so no need for
interrupts-extended.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230405060906.143058-3-krzysztof.kozlowski@linaro.org