[DO NOT MERGE] verity: force a reboot that clears verity red

* This patch should never be used long term. It will cause the kernel
  to just reboot over and over again, but it clears the verity red for
  you, so hold the volume button to boot back into the bootloader after
  letting this reboot itself once, and flash something else to enjoy
  no more red verity message on boot.

Change-Id: Ib1abb1122e6cfb900744ebf24d25cee15b7802f9

drivers/md/dm-android-verity.c

@@ -678,6 +678,8 @@ static int android_verity_ctr(struct dm_target *ti, unsigned argc, char **argv)
 	unsigned long long tmpll;
 	u64  uninitialized_var(device_size);
 
+	kernel_restart("dm-verity enforcing");
+
 	if (argc == 1) {
 		/* Use the default keyid */
 		if (default_verity_key_id())