platform/x86: intel_scu_wdt: Drop SCU notification

Since SCU code along with the Intel MID watchdog driver has been refactored
in a way that latter will be probed only after the former has been come
to live, the notification code is bogus and not needed. Remove it for good.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>

drivers/platform/x86/intel_scu_wdt.c

@@ -12,7 +12,6 @@
 #include <linux/platform_data/intel-mid_wdt.h>
 
 #include <asm/intel-mid.h>
-#include <asm/intel_scu_ipc.h>
 #include <asm/io_apic.h>
 #include <asm/hw_irq.h>
 
@@ -49,34 +48,18 @@ static struct intel_mid_wdt_pdata tangier_pdata = {
 	.probe = tangier_probe,
 };
 
-static int wdt_scu_status_change(struct notifier_block *nb,
-				 unsigned long code, void *data)
-{
-	if (code == SCU_DOWN) {
-		platform_device_unregister(&wdt_dev);
-		return 0;
-	}
-
-	return platform_device_register(&wdt_dev);
-}
-
-static struct notifier_block wdt_scu_notifier = {
-	.notifier_call	= wdt_scu_status_change,
-};
-
 static int __init register_mid_wdt(void)
 {
 	if (intel_mid_identify_cpu() != INTEL_MID_CPU_CHIP_TANGIER)
 		return -ENODEV;
 
 	wdt_dev.dev.platform_data = &tangier_pdata;
-
-	/*
-	 * We need to be sure that the SCU IPC is ready before watchdog device
-	 * can be registered:
-	 */
-	intel_scu_notifier_add(&wdt_scu_notifier);
-
-	return 0;
+	return platform_device_register(&wdt_dev);
 }
 arch_initcall(register_mid_wdt);
+
+static void __exit unregister_mid_wdt(void)
+{
+	platform_device_unregister(&wdt_dev);
+}
+__exitcall(unregister_mid_wdt);