ARM: dts: msm: Add display RSC device bindings for sdm670

Add device bindings for the display subsystem RSC. The RSC contains
the TCS that will be used to send sleep/wake/active requests to the
RPMH blocks for the SDE subsystem.

Change-Id: I9ee044ab984b9030241555db18b20e4d38345f98
Signed-off-by: Maulik Shah <mkshah@codeaurora.org>
diff --git a/arch/arm64/boot/dts/qcom/sdm670.dtsi b/arch/arm64/boot/dts/qcom/sdm670.dtsi
index 3eae5f3..16b4663 100644
--- a/arch/arm64/boot/dts/qcom/sdm670.dtsi
+++ b/arch/arm64/boot/dts/qcom/sdm670.dtsi
@@ -1042,6 +1042,19 @@
 				<CONTROL_TCS   1>;
 	};
 
+	disp_rsc: mailbox@af20000 {
+		compatible = "qcom,tcs-drv";
+		label = "display_rsc";
+		reg = <0xaf20000 0x100>, <0xaf21c00 0x3000>;
+		interrupts = <0 129 0>;
+		#mbox-cells = <1>;
+		qcom,drv-id = <0>;
+		qcom,tcs-config = <SLEEP_TCS 1>,
+				<WAKE_TCS    1>,
+				<ACTIVE_TCS  0>,
+				<CONTROL_TCS 1>;
+	};
+
 	system_pm {
 		compatible = "qcom,system-pm";
 		mboxes = <&apps_rsc 0>;