arm64: dts: qcom: sc7280: Add EPSS L3 interconnect provider

Add Epoch Subsystem (EPSS) L3 interconnect provider node on SC7280
SoCs.

Signed-off-by: Odelu Kukatla <okukatla@codeaurora.org>
Acked-by: Georgi Djakov <djakov@kernel.org>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/1634812857-10676-4-git-send-email-okukatla@codeaurora.org