arm64: dts: qcom: sm8250: Add TCSR halt register space

Enable download mode for sm8250 which can help collect
ramdump for this SoC.
Signed-off-by: Mukesh Ojha <quic_mojha@quicinc.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/1698253601-11957-2-git-send-email-quic_mojha@quicinc.comSigned-off-by: Bjorn Andersson <andersson@kernel.org>

arch/arm64/boot/dts/qcom/sm8250.dtsi

@@ -671,6 +671,7 @@ cpu7_opp20: opp-2841600000 {
 	firmware {
 		scm: scm {
 			compatible = "qcom,scm-sm8250", "qcom,scm";
+			qcom,dload-mode = <&tcsr 0x13000>;
 			#reset-cells = <1>;
 		};
 	};
@@ -2564,6 +2565,11 @@ tcsr_mutex: hwlock@1f40000 {
 			#hwlock-cells = <1>;
 		};
 
+		tcsr: syscon@1fc0000 {
+			compatible = "qcom,sm8250-tcsr", "syscon";
+			reg = <0x0 0x1fc0000 0x0 0x30000>;
+		};
+
 		wsamacro: codec@3240000 {
 			compatible = "qcom,sm8250-lpass-wsa-macro";
 			reg = <0 0x03240000 0 0x1000>;