ANDROID: android-verity: Fix broken parameter handling.

android-verity documentation states that the target expectets
the key, followed by the backing device on the commandline as follows

  "dm=system none ro,0 1 android-verity <public-key-id> <backing-partition>"

However, the code actually expects the backing device as the first
parameter. Fix that.

Bug: 72722987

Change-Id: Ibd56c0220f6003bdfb95aa2d611f787e75a65c97
Signed-off-by: Sandeep Patil <sspatil@google.com>

Author: patils

drivers/md/dm-android-verity.c

@@ -693,16 +693,16 @@ static int android_verity_ctr(struct dm_target *ti, unsigned argc, char **argv)
 			handle_error();
 			return -EINVAL;
 		}
-	} else if (argc == 2)
-		key_id = argv[1];
-	else {
+		target_device = argv[0];
+	} else if (argc == 2) {
+		key_id = argv[0];
+		target_device = argv[1];
+	} else {
 		DMERR("Incorrect number of arguments");
 		handle_error();
 		return -EINVAL;
 	}
 
-	target_device = argv[0];
-
 	dev = name_to_dev_t(target_device);
 	if (!dev) {
 		DMERR("no dev found for %s", target_device);