greybus: arche-platform: Disable wake/detect interrupt in poweroff

In poweroff() fn, we are shutting down SVC, so disable interrupt
as well.

Testing Done: Tested on DB3.5 platform.
Signed-off-by: Vaibhav Hiremath <vaibhav.hiremath@linaro.org>
Reviewed-by: Michael Scott <michael.scott@linaro.org>
Tested-by: Michael Scott <michael.scott@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

drivers/staging/greybus/arche-platform.c

@@ -265,6 +265,7 @@ static void arche_platform_poweroff_seq(struct arche_platform_drvdata *arche_pda
 
 	/* If in fw_flashing mode, then no need to repeate things again */
 	if (arche_pdata->state != ARCHE_PLATFORM_STATE_FW_FLASHING) {
+		disable_irq(arche_pdata->wake_detect_irq);
 		/* Send disconnect/detach event to SVC */
 		gpio_direction_output(arche_pdata->wake_detect_gpio, 0);
 		usleep_range(100, 200);