arm64: dts: msm8916: Properly deal with ETMv4 power management

Properly deal with ETMv4 power management by adding the
"coresight-loses-context-with-cpu" property.  Otherwise tracer
configuration is lost when CPUs enter deep idle states, resulting
in the failure of the trace session.
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Link: https://lore.kernel.org/r/20200211183011.24720-1-mathieu.poirier@linaro.orgSigned-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>

arch/arm64/boot/dts/qcom/msm8916.dtsi

@@ -1415,6 +1415,7 @@ etm@85c000 {
 
 			clocks = <&rpmcc RPM_QDSS_CLK>, <&rpmcc RPM_QDSS_A_CLK>;
 			clock-names = "apb_pclk", "atclk";
+			arm,coresight-loses-context-with-cpu;
 
 			cpu = <&CPU0>;
 
@@ -1433,6 +1434,7 @@ etm@85d000 {
 
 			clocks = <&rpmcc RPM_QDSS_CLK>, <&rpmcc RPM_QDSS_A_CLK>;
 			clock-names = "apb_pclk", "atclk";
+			arm,coresight-loses-context-with-cpu;
 
 			cpu = <&CPU1>;
 
@@ -1451,6 +1453,7 @@ etm@85e000 {
 
 			clocks = <&rpmcc RPM_QDSS_CLK>, <&rpmcc RPM_QDSS_A_CLK>;
 			clock-names = "apb_pclk", "atclk";
+			arm,coresight-loses-context-with-cpu;
 
 			cpu = <&CPU2>;
 
@@ -1469,6 +1472,7 @@ etm@85f000 {
 
 			clocks = <&rpmcc RPM_QDSS_CLK>, <&rpmcc RPM_QDSS_A_CLK>;
 			clock-names = "apb_pclk", "atclk";
+			arm,coresight-loses-context-with-cpu;
 
 			cpu = <&CPU3>;