genirq: show_interrupts: Check desc->name before printing it blindly

desc->name is not required and not used by all architectures.
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>

kernel/irq/proc.c

@@ -405,6 +405,7 @@ int show_interrupts(struct seq_file *p, void *v)
 	for_each_online_cpu(j)
 		seq_printf(p, "%10u ", kstat_irqs_cpu(i, j));
 	seq_printf(p, " %8s", desc->irq_data.chip->name);
+	if (desc->name)
 		seq_printf(p, "-%-8s", desc->name);
 
 	if (action) {