dm: simplify target code conditional on CONFIG_BLK_DEV_ZONED

Allow removal of CONFIG_BLK_DEV_ZONED conditionals in target_type
definition of various targets.

Suggested-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
diff --git a/drivers/md/dm-flakey.c b/drivers/md/dm-flakey.c
index 30c6bc1..b7fee99 100644
--- a/drivers/md/dm-flakey.c
+++ b/drivers/md/dm-flakey.c
@@ -469,6 +469,8 @@ static int flakey_report_zones(struct dm_target *ti,
 	return blkdev_report_zones(fc->dev->bdev, sector, nr_zones,
 				   dm_report_zones_cb, args);
 }
+#else
+#define flakey_report_zones NULL
 #endif
 
 static int flakey_iterate_devices(struct dm_target *ti, iterate_devices_callout_fn fn, void *data)
@@ -481,12 +483,8 @@ static int flakey_iterate_devices(struct dm_target *ti, iterate_devices_callout_
 static struct target_type flakey_target = {
 	.name   = "flakey",
 	.version = {1, 5, 0},
-#ifdef CONFIG_BLK_DEV_ZONED
 	.features = DM_TARGET_ZONED_HM | DM_TARGET_PASSES_CRYPTO,
 	.report_zones = flakey_report_zones,
-#else
-	.features = DM_TARGET_PASSES_CRYPTO,
-#endif
 	.module = THIS_MODULE,
 	.ctr    = flakey_ctr,
 	.dtr    = flakey_dtr,