arm64: dts: qcom: sdx75: Add modem SMP2P node

Add SMP2P node for the SDX75 platform to communicate with the modem.
Signed-off-by: Kaushal Kumar <quic_kaushalk@quicinc.com>
Link: https://lore.kernel.org/r/20240426112837.17478-1-quic_kaushalk@quicinc.comSigned-off-by: Bjorn Andersson <andersson@kernel.org>

arch/arm64/boot/dts/qcom/sdx75.dtsi

@@ -406,6 +406,41 @@ hyp_smmu_s2_pt_mem: hyp-smmu-s2-pt@bfc00000 {
 		};
 	};
 
+	smp2p-modem {
+		compatible = "qcom,smp2p";
+		qcom,smem = <435>, <428>;
+		interrupts-extended = <&ipcc IPCC_CLIENT_MPSS
+					     IPCC_MPROC_SIGNAL_SMP2P
+					     IRQ_TYPE_EDGE_RISING>;
+		mboxes = <&ipcc IPCC_CLIENT_MPSS
+				IPCC_MPROC_SIGNAL_SMP2P>;
+
+		qcom,local-pid = <0>;
+		qcom,remote-pid = <1>;
+
+		smp2p_modem_out: master-kernel {
+			qcom,entry-name = "master-kernel";
+			#qcom,smem-state-cells = <1>;
+		};
+
+		smp2p_modem_in: slave-kernel {
+			qcom,entry-name = "slave-kernel";
+			interrupt-controller;
+			#interrupt-cells = <2>;
+		};
+
+		ipa_smp2p_out: ipa-ap-to-modem {
+			qcom,entry-name = "ipa";
+			#qcom,smem-state-cells = <1>;
+		};
+
+		ipa_smp2p_in: ipa-modem-to-ap {
+			qcom,entry-name = "ipa";
+			interrupt-controller;
+			#interrupt-cells = <2>;
+		};
+	};
+
 	smem: qcom,smem {
 		compatible = "qcom,smem";
 		memory-region = <&smem_mem>;