[source] kirkwood: fix uimage creation for some kirkwood devices

[LEDE Commits]

blogic pushed a commit to source.git, branch master:
https://git.lede-project.org/b9a55277d590410ee69cc3f8fda029c60977a029

commit b9a55277d590410ee69cc3f8fda029c60977a029
Author: bobafetthotmail <starshipeleven at outlook.com>
AuthorDate: Sat Sep 3 17:03:34 2016 +0200

    kirkwood: fix uimage creation for some kirkwood devices
    
    because with the current system I'm getting fake uImages that are actually a
    renamed zImage, and that's plain wrong.
    This fixes bug https://bugs.lede-project.org/index.php?do=details&task_id=131
    and https://bugs.lede-project.org/index.php?do=details&task_id=139
    
    Signed-off-by: Alberto Bursi <alberto.bursi at outlook.it>
---
 target/linux/kirkwood/image/Makefile | 1 -
 1 file changed, 1 deletion(-)

diff --git a/target/linux/kirkwood/image/Makefile b/target/linux/kirkwood/image/Makefile
index 80bd019..1fb482f 100644
--- a/target/linux/kirkwood/image/Makefile
+++ b/target/linux/kirkwood/image/Makefile
@@ -38,7 +38,6 @@ define Device/dockstar
   IMAGES += factory.bin
   IMAGE/factory.bin := append-ubi
   KERNEL_IN_UBI := 1
-  KERNEL := kernel-bin | append-dtb
 endef
 
 define Device/goflexnet