module: zfs: vdev: shim out vdev_indirect_mapping_verify()

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Ahelenia Ziemiańska <nabijaczleweli@nabijaczleweli.xyz>
Closes #12844

module/zfs/vdev_indirect_mapping.c

@@ -54,6 +54,8 @@ vdev_indirect_mapping_verify(vdev_indirect_mapping_t *vim)
 
 	return (B_TRUE);
 }
+#else
+#define	vdev_indirect_mapping_verify(vim) ((void) sizeof (vim), B_TRUE)
 #endif
 
 uint64_t