samples: tracing: Use SystemView RTT tracing snippet

Refactors the SystemView sample configuration to use the rtt-tracing
snippet.

Signed-off-by: Maureen Helm <maureen.helm@analog.com>

samples/subsys/tracing/README.rst

@@ -113,3 +113,17 @@ Build a USER-tracing image with:
 	:compact:
 
 After the application has run for a while, check the trace output file.
+
+Usage for SEGGER SystemView RTT
+*******************************
+
+Build a SystemView-tracing image with the :ref:`snippet-rtt-tracing`:
+
+.. zephyr-app-commands::
+	:zephyr-app: samples/subsys/tracing
+	:board: frdm_k64f
+	:snippets: rtt-tracing
+	:goals: build
+	:compact:
+
+After the application has run for a while, check the trace output file.

samples/subsys/tracing/prj_sysview.conf

@@ -1,5 +0,0 @@
-CONFIG_TRACING=y
-CONFIG_SEGGER_SYSTEMVIEW=y
-CONFIG_IDLE_STACK_SIZE=2048
-CONFIG_SEGGER_SYSTEMVIEW_BOOT_ENABLE=n
-CONFIG_SEGGER_SYSVIEW_POST_MORTEM_MODE=n

samples/subsys/tracing/sample.yaml

@@ -28,7 +28,7 @@ tests:
       - mimxrt1064_evk
     integration_platforms:
       - nrf52840dk/nrf52840
-    extra_args: CONF_FILE="prj_sysview.conf"
+    extra_args: SNIPPET="rtt-tracing"
   sample.tracing.osawareness.openocd:
     arch_exclude:
       - posix