QCLINUX: arm64: dts: qcom: monaco: Add CamX EL2 overlay

Add camx el2 DT overlay for lemans platforms.

The overlay updates the ICP firmware node with Secure SMMU SID
and disables secure QoS updates for CPAS in EL2/KVM configurations.

Wire up the new overlay-built DTBs in the qcom DT Makefile so the
corresponding *-camx-el2.dtb targets are generated.

Signed-off-by: Vikram Sharma <vikramsa@qti.qualcomm.com>

Author: quic-vikramsa

arch/arm64/boot/dts/qcom/Makefile

@@ -411,6 +411,10 @@ monaco-evk-camx-dtbs   := monaco-evk.dtb monaco-evk-camx.dtbo
 
 dtb-$(CONFIG_ARCH_QCOM) += monaco-evk-camx.dtb
 
+monaco-camx-el2-dtbs	:= monaco-evk-el2.dtb monaco-evk-camx.dtbo monaco-camx-el2.dtbo
+
+dtb-$(CONFIG_ARCH_QCOM)	+= monaco-camx-el2.dtb
+
 qcs615-ride-camx-dtbs	:= qcs615-ride.dtb qcs615-ride-camx.dtbo
 
 dtb-$(CONFIG_ARCH_QCOM)	+= qcs615-ride-camx.dtb

arch/arm64/boot/dts/qcom/monaco-camx-el2.dtso

@@ -0,0 +1,25 @@
+// SPDX-License-Identifier: BSD-3-Clause
+/*
+ * Copyright (c) Qualcomm Technologies, Inc. and/or its subsidiaries.
+ */
+
+/dts-v1/;
+/plugin/;
+
+/ {
+	fragment@0 {
+		target-path = "/soc@0/qcom,cam-cpas";
+		__overlay__ {
+			enable-secure-qos-update = <0>;
+		};
+	};
+
+	fragment@1 {
+		target-path = "/soc@0/qcom,cam-icp";
+		__overlay__ {
+			camera-firmware {
+				iommus = <&apps_smmu 0x08c1 0x0400>;
+			};
+		};
+	};
+};