arm64: dts: qcom: sm8250: drop the virtual ipa-virt device

Drop the virtual ipa-virt device. The interconnects it provided are
going to be represented as <&rpmhcc RPMH_IPA_CLK> clock.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230109002935.244320-13-dmitry.baryshkov@linaro.org