parse-events: Allow '*' and '/' operations in TP_printk

Add multiply and divide operations in the printk format.
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Arnaldo Carvalho de Melo <acme@infradead.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Arun Sharma <asharma@fb.com>
Cc: Namhyung Kim <namhyung.kim@lge.com>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>

tools/lib/traceevent/event-parse.c

@@ -3130,6 +3130,12 @@ eval_num_arg(void *data, int size, struct event_format *event, struct print_arg
 		case '+':
 			val = left + right;
 			break;
+		case '/':
+			val = left / right;
+			break;
+		case '*':
+			val = left * right;
+			break;
 		default:
 			die("unknown op '%s'", arg->op.op);
 		}