DART-6UL Yocto Krogoth Customizing kernel and uboot

DART-6UL - Customizing the Linux kernel and U-Boot

Once completed developing your own kernel and U-Boot, create your own github account and upload your proprietary kernel and U-Boot to a new repository.
Replace Variscite's Kernel and U-Boot yocto links, to point to your newly created github branches. i.e. replace kernel link:
https://github.com/varigit/meta-variscite-mx6/blob/Krogoth-imx-4.1.15-1.2.0_ga-var01/recipes-kernel/linux/linux-variscite_4.1.15.bb

SRCBRANCH_mx6ul = "imx-rel_imx_4.1.15_1.2.0_ga-var01"
SRCREV = "${AUTOREV}"
KERNEL_SRC ?= "git://github.com/varigit/linux-2.6-imx.git;protocol=git"

with your own. For example:

SRCBRANCH_mx6ul = "Krogoth-imx-4.1.15-1.2.0_ga-var01"
SRCREV = "${AUTOREV}"
KERNEL_SRC ?= "git://github.com/customer/linux-2.6-imx.git;protocol=git"

Also replace:
https://github.com/varigit/meta-variscite-mx6/blob/Krogoth-imx-4.1.15-1.2.0_ga-var01/recipes-bsp/u-boot/u-boot-variscite_2015.10.bb

SRCREV = "${AUTOREV}"
SRCBRANCH = "imx_v2015.10_dart_6ul_var1"
SRC_URI = "git://github.com/customer/uboot-imx.git;protocol=git;branch=${SRCBRANCH}"

to replace Variscite's U-Boot with your own.