irq: Remove smp_affinity_list when unregister irq proc

commit 4b06042(bitmap, irq: add smp_affinity_list interface to
/proc/irq) causes the following warning:

[  274.239500] WARNING: at fs/proc/generic.c:850 remove_proc_entry+0x24c/0x27a()
[  274.251761] remove_proc_entry: removing non-empty directory 'irq/184',
    	       leaking at least 'smp_affinity_list'

Remove the new file in the exit path.
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Cc: Mike Travis <travis@sgi.com>
Link: http://lkml.kernel.org/r/4DDDE094.6050505@kernel.orgSigned-off-by: Thomas Gleixner <tglx@linutronix.de>

kernel/irq/proc.c

@@ -352,6 +352,7 @@ void unregister_irq_proc(unsigned int irq, struct irq_desc *desc)
 #ifdef CONFIG_SMP
 	remove_proc_entry("smp_affinity", desc->dir);
 	remove_proc_entry("affinity_hint", desc->dir);
+	remove_proc_entry("smp_affinity_list", desc->dir);
 	remove_proc_entry("node", desc->dir);
 #endif
 	remove_proc_entry("spurious", desc->dir);