genirq: Fix various typos in comments

Go over the IRQ subsystem source code (including irqchip drivers) and
fix common typos in comments.

No change in functionality intended.

Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Jason Cooper <jason@lakedaemon.net>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: linux-kernel@vger.kernel.org
diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c
index a2b3d9d..34e9690 100644
--- a/kernel/irq/chip.c
+++ b/kernel/irq/chip.c
@@ -929,7 +929,7 @@ __irq_do_set_handler(struct irq_desc *desc, irq_flow_handler_t handle,
 				break;
 			/*
 			 * Bail out if the outer chip is not set up
-			 * and the interrrupt supposed to be started
+			 * and the interrupt supposed to be started
 			 * right away.
 			 */
 			if (WARN_ON(is_chained))