perfetto: Add the intel data sources to system.cfg.

Now I don't need to remember different perfetto setups depending on which
system I'm profiling.

Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/20658>

src/tool/pps/cfg/system.cfg

@@ -18,6 +18,21 @@ data_sources {
   }
 }
 
+data_sources {
+  config {
+    name: "gpu.counters.i915"
+    gpu_counter_config {
+      counter_period_ns: 100000
+    }
+  }
+}
+
+data_sources {
+  config {
+    name: "gpu.renderstages.intel"
+  }
+}
+
 data_sources {
   config {
     name: "track_event"
@@ -96,6 +111,16 @@ data_sources {
   }
 }
 
+data_sources {
+  config {
+    name: "track_event"
+    track_event_config {
+      enabled_categories: "mesa.default"
+      enabled_categories: "mesa.slow"
+    }
+  }
+}
+
 data_sources {
   config {
     name: "perfetto.metatrace"