perf evsel: Ditch evsel->handler.data field

Not needed since this cset:

  fcf65bf149af: perf evsel: Cache associated event_format

So lets trim this struct a bit.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-j8setslokt0goiwxq9dogzqm@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
index b3e57dc..ee59df3 100644
--- a/tools/perf/builtin-trace.c
+++ b/tools/perf/builtin-trace.c
@@ -1570,7 +1570,7 @@
 	struct trace *trace = container_of(tool, struct trace, tool);
 	int err = 0;
 
-	tracepoint_handler handler = evsel->handler.func;
+	tracepoint_handler handler = evsel->handler;
 
 	if (skip_sample(trace, sample))
 		return 0;
@@ -1656,7 +1656,7 @@
 		return;
 	}
 
-	evsel->handler.func = trace__vfs_getname;
+	evsel->handler = trace__vfs_getname;
 	perf_evlist__add(evlist, evsel);
 }
 
@@ -1768,7 +1768,7 @@
 				goto next_event;
 			}
 
-			handler = evsel->handler.func;
+			handler = evsel->handler;
 			handler(trace, evsel, &sample);
 next_event:
 			perf_evlist__mmap_consume(evlist, i);