[source] ramips: improve Linksys EA8500 build code

[LEDE Commits]

mkresin pushed a commit to source.git, branch master:
https://git.lede-project.org/c7d5bc8197609a62f03f3f6b3d665ae73bd1072b

commit c7d5bc8197609a62f03f3f6b3d665ae73bd1072b
Author: Mathias Kresin <dev at kresin.me>
AuthorDate: Sun Sep 11 17:46:09 2016 +0200

    ramips: improve Linksys EA8500 build code
    
    Use of the kernel size variable.
    
    Signed-off-by: Mathias Kresin <dev at kresin.me>
---
 target/linux/ipq806x/image/Makefile | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/target/linux/ipq806x/image/Makefile b/target/linux/ipq806x/image/Makefile
index ff5be05..daf910e 100644
--- a/target/linux/ipq806x/image/Makefile
+++ b/target/linux/ipq806x/image/Makefile
@@ -150,13 +150,13 @@ define Device/EA8500
 	DEVICE_DTS := qcom-ipq8064-ea8500
 	PAGESIZE := 2048
 	BLOCKSIZE := 128k
-	KERNEL_SIZE := 3145728
+	KERNEL_SIZE := 3072k
 	FILESYSTEMS := squashfs
 	KERNEL = kernel-bin | append-dtb | uImage none | append-file $(KDIR)/root.dummy
 	PROFILES += $$(DEVICE_NAME)
 	BOARD_NAME := ea8500
 	IMAGES := factory.bin sysupgrade.tar
-	IMAGE/factory.bin := append-kernel 3145728 | append-ubi
+	IMAGE/factory.bin := append-kernel | pad-to $$$${KERNEL_SIZE} | append-ubi
 	IMAGE/sysupgrade.tar := sysupgrade-tar
 	DEVICE_TITLE := Linksys EA8500
 	DEVICE_PACKAGES := ath10k-firmware-qca99x0