mfd: tps65217: Support an interrupt pin as the system wakeup

TPS65217 INT pin is used for the system wakeup from suspend mode.
This patch enables push button or charger input event as a wakeup source.

Signed-off-by: Milo Kim <woogyom.kim@gmail.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>

drivers/mfd/tps65217.c

@@ -183,6 +183,8 @@ static int tps65217_irq_init(struct tps65217 *tps, int irq)
 		return ret;
 	}
 
+	enable_irq_wake(irq);
+
 	return 0;
 }