[openwrt/openwrt] mvebu: unset uboot build by default

[LEDE Commits]

mkresin pushed a commit to openwrt/openwrt.git, branch master:
https://git.lede-project.org/2d67ef86382f32847bdfe120912cbaff11a956d5

commit 2d67ef86382f32847bdfe120912cbaff11a956d5
Author: Mathias Kresin <dev at kresin.me>
AuthorDate: Wed Mar 14 22:07:08 2018 +0100

    mvebu: unset uboot build by default
    
    Initialise the UBOOT variable by default. Otherwise it will be
    unintended inherit to following images if set and causes an uboot build
    where not required.
    
    Signed-off-by: Mathias Kresin <dev at kresin.me>
---
 target/linux/mvebu/image/Makefile     | 2 ++
 target/linux/mvebu/image/cortex-a9.mk | 1 -
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/target/linux/mvebu/image/Makefile b/target/linux/mvebu/image/Makefile
index 55e1a0b..4f6d8f5 100644
--- a/target/linux/mvebu/image/Makefile
+++ b/target/linux/mvebu/image/Makefile
@@ -87,7 +87,9 @@ define Device/Default
   KERNEL_NAME := zImage
   KERNEL := kernel-bin | append-dtb | uImage none
   SUPPORTED_DEVICES = $$(DEVICE_DTS)
+  UBOOT :=
 endef
+DEVICE_VARS += UBOOT
 
 define Device/UBI
   IMAGES := sysupgrade.bin
diff --git a/target/linux/mvebu/image/cortex-a9.mk b/target/linux/mvebu/image/cortex-a9.mk
index aa56a72..d9defe8 100644
--- a/target/linux/mvebu/image/cortex-a9.mk
+++ b/target/linux/mvebu/image/cortex-a9.mk
@@ -158,7 +158,6 @@ define Device/turris-omnia
   IMAGE/omnia-medkit-$$(IMAGE_PREFIX)-initramfs.tar.gz := omnia-medkit-initramfs | gzip
   IMAGE_NAME = $$(2)
   DEVICE_DTS := armada-385-turris-omnia
-  UBOOT :=
 endef
 TARGET_DEVICES += turris-omnia