perf tools: Rename 'struct sample_data' to 'struct perf_sample'

Making the namespace more uniform.

Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Tom Zanussi <tzanussi@gmail.com>
LKML-Reference: <new-submission>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
diff --git a/tools/perf/builtin-diff.c b/tools/perf/builtin-diff.c
index 3153e49..0822149 100644
--- a/tools/perf/builtin-diff.c
+++ b/tools/perf/builtin-diff.c
@@ -31,7 +31,7 @@
 }
 
 static int diff__process_sample_event(event_t *event,
-				      struct sample_data *sample,
+				      struct perf_sample *sample,
 				      struct perf_session *session)
 {
 	struct addr_location al;