genirq: Fix /proc/interrupts output alignment

If the irq_desc being output does not have a domain associated the
information following the 'name' is not aligned correctly.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Link: http://lkml.kernel.org/r/20170210165416.5629-1-hsweeten@visionengravers.comSigned-off-by: Thomas Gleixner <tglx@linutronix.de>

kernel/irq/proc.c

@@ -487,6 +487,8 @@ int show_interrupts(struct seq_file *p, void *v)
 	}
 	if (desc->irq_data.domain)
 		seq_printf(p, " %*d", prec, (int) desc->irq_data.hwirq);
+	else
+		seq_printf(p, " %*s", prec, "");
 #ifdef CONFIG_GENERIC_IRQ_SHOW_LEVEL
 	seq_printf(p, " %-8s", irqd_is_level_type(&desc->irq_data) ? "Level" : "Edge");
 #endif