[source] kmod-sched-cake: do not build on kernel 3.18

[LEDE Commits]

hauke pushed a commit to source.git, branch master:
https://git.lede-project.org/9c49c937ab74506f70c651d1207948e3943b60fc

commit 9c49c937ab74506f70c651d1207948e3943b60fc
Author: Hauke Mehrtens <hauke at hauke-m.de>
AuthorDate: Sun Dec 25 15:15:55 2016 +0100

    kmod-sched-cake: do not build on kernel 3.18
    
    kmod-sched-cake does not build on kernel 3.18, so add the dependency to
    not even try.
    
    Signed-off-by: Hauke Mehrtens <hauke at hauke-m.de>
---
 package/kernel/kmod-sched-cake/Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/package/kernel/kmod-sched-cake/Makefile b/package/kernel/kmod-sched-cake/Makefile
index b81010e..519278d 100644
--- a/package/kernel/kmod-sched-cake/Makefile
+++ b/package/kernel/kmod-sched-cake/Makefile
@@ -26,7 +26,7 @@ define KernelPackage/sched-cake
   URL:=https://github.com/dtaht/sch_cake
   FILES:=$(PKG_BUILD_DIR)/sch_cake.ko
   AUTOLOAD:=$(call AutoLoad,75,sch_cake)
-  DEPENDS:=+kmod-ipt-conntrack
+  DEPENDS:=+kmod-ipt-conntrack @!LINUX_3_18
 endef
 
 include $(INCLUDE_DIR)/kernel-defaults.mk