tracing: Have branch tracer use trace_handle_return() helper function

The branch tracer should not be checking the trace_seq_printf() return value
as that will soon be void. There's a new trace_handle_return() helper function
that will return TRACE_TYPE_PARTIAL_LINE if the trace_seq overflowed
and TRACE_TYPE_HANDLED otherwise.

Reviewed-by: Petr Mladek <pmladek@suse.cz>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

kernel/trace/trace_branch.c

@@ -151,14 +151,13 @@ static enum print_line_t trace_branch_print(struct trace_iterator *iter,
 
 	trace_assign_type(field, iter->ent);
 
-	if (trace_seq_printf(&iter->seq, "[%s] %s:%s:%d\n",
+	trace_seq_printf(&iter->seq, "[%s] %s:%s:%d\n",
 			 field->correct ? "  ok  " : " MISS ",
 			 field->func,
 			 field->file,
-			     field->line))
-		return TRACE_TYPE_PARTIAL_LINE;
+			 field->line);
 
-	return TRACE_TYPE_HANDLED;
+	return trace_handle_return(&iter->seq);
 }
 
 static void branch_print_header(struct seq_file *s)