Hi, I figured out the way to do this, im not sure if this is the good approach, but so far it works for me. So ill just post it here if someone else stumbles upon this issue. I was on good track with

Hello everyone, I started to build kernel with initramfs, and so far all that works great. I got my new shiny zImage-initramfs--4.1.14..xxx.bin. I can boot it over tftp, its does exactly what i want.