arm64: dts: qcom: sc7280: Add proxy interconnect requirements for modem

Add interconnects that are required to be proxy voted upon during modem
bootup on SC7280 SoCs.

Reviewed-by: Matthias Kaehlcke <mka@chromium.org>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Signed-off-by: Sibi Sankar <quic_sibis@quicinc.com>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/1652978825-5304-2-git-send-email-quic_sibis@quicinc.com