genirq: Update the a comment typo

Change the comment "chasnge" to "change".
Signed-off-by: NChuansheng Liu <chuansheng.liu@intel.com>
Link: http://lkml.kernel.org/r/1392020037-5484-2-git-send-email-chuansheng.liu@intel.comSigned-off-by: NThomas Gleixner <tglx@linutronix.de>

kernel/irq/manage.c

@@ -757,7 +757,7 @@ static void irq_finalize_oneshot(struct irq_desc *desc,
 
 #ifdef CONFIG_SMP
 /*
- * Check whether we need to chasnge the affinity of the interrupt thread.
+ * Check whether we need to change the affinity of the interrupt thread.
  */
 static void
 irq_thread_check_affinity(struct irq_desc *desc, struct irqaction *action)