arm64: dts: qcom: sc8280xp: Add epss_l3 node

Add a device node for the EPSS L3 frequency domain.
Signed-off-by: Bjorn Andersson <quic_bjorande@quicinc.com>
Tested-by: Steev Klimaszewski <steev@kali.org>
Reviewed-by: Sibi Sankar <quic_sibis@quicinc.com>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20221111032515.3460-8-quic_bjorande@quicinc.com

arch/arm64/boot/dts/qcom/sc8280xp.dtsi

@@ -2260,6 +2260,16 @@ rpmhpd_opp_turbo_l1: opp10 {
 			};
 		};
 
+		epss_l3: interconnect@18590000 {
+			compatible = "qcom,sc8280xp-epss-l3", "qcom,epss-l3";
+			reg = <0 0x18590000 0 0x1000>;
+
+			clocks = <&rpmhcc RPMH_CXO_CLK>, <&gcc GCC_GPLL0>;
+			clock-names = "xo", "alternate";
+
+			#interconnect-cells = <1>;
+		};
+
 		cpufreq_hw: cpufreq@18591000 {
 			compatible = "qcom,sc8280xp-cpufreq-epss", "qcom,cpufreq-epss";
 			reg = <0 0x18591000 0 0x1000>,