[][OpenWrt Dev][Build kernel FIT image after generating squashfs rootfs]

[Description]
Add build prereq for kernel FIT image to be built after generating
squashfs rootfs

[Release-log]
N/A

Change-Id: Ia00648ca3d2d7c121505149ba0c056c087aa5efc
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/5602767
1 file changed