perf callchain: Remove unneeded 'result' variable

Return the value scnprintf() directly instead of storing it in a
redundant variable.

Reported-by: Zeal Robot <zealci@zte.com.cn>
Signed-off-by: ye xingchen <ye.xingchen@zte.com.cn>
Cc: Alexandre Truong <alexandre.truong@arm.com>
Cc: Ian Rogers <irogers@google.com>
Cc: James Clark <james.clark@arm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/util/callchain.c

@@ -1307,24 +1307,16 @@ int callchain_branch_counts(struct callchain_root *root,
 
 static int count_pri64_printf(int idx, const char *str, u64 value, char *bf, int bfsize)
 {
-	int printed;
-
-	printed = scnprintf(bf, bfsize, "%s%s:%" PRId64 "", (idx) ? " " : " (", str, value);
-
-	return printed;
+	return scnprintf(bf, bfsize, "%s%s:%" PRId64 "", (idx) ? " " : " (", str, value);
 }
 
 static int count_float_printf(int idx, const char *str, float value,
 			      char *bf, int bfsize, float threshold)
 {
-	int printed;
-
 	if (threshold != 0.0 && value < threshold)
 		return 0;
 
-	printed = scnprintf(bf, bfsize, "%s%s:%.1f%%", (idx) ? " " : " (", str, value);
-
-	return printed;
+	return scnprintf(bf, bfsize, "%s%s:%.1f%%", (idx) ? " " : " (", str, value);
 }
 
 static int branch_to_str(char *bf, int bfsize,