arm64: dts: qcom: sc7180: Remove ipa interconnect node

This device node is unused now that we've removed the driver that
consumed it in the kernel. Drop the unused node to save some space.

Cc: Alex Elder <elder@linaro.org>
Cc: Taniya Das <quic_tdas@quicinc.com>
Cc: Mike Tipton <quic_mdtipton@quicinc.com>
Cc: Georgi Djakov <djakov@kernel.org>
Signed-off-by: Stephen Boyd <swboyd@chromium.org>
Acked-by: Georgi Djakov <djakov@kernel.org>
Reviewed-by: Alex Elder <elder@linaro.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20220415005828.1980055-1-swboyd@chromium.org