coreboot

I made a clone on 12 Dec, 7 Dec and in the last dates of November, every time starting from scratch. All compiles well and without warnings, but upon startup of a known to be working system - it panics or drops into initramfs. I could not distinguish the difference behind either.
But, when using bare 4.11 release (19 Nov) and following the same steps - it builds, boots and the same system is working. I could not get any IOMMU groups output however, but maybe it's not related.
The config contains storage and vgabios (internal only) change.

Steps to reproduce:
$ git clone https://review.coreboot.org/coreboot
$ cd coreboot
$ git submodule update --init --checkout
place a [vgabios.bin]
$ make menuconfig
$ make crossgcc-i386 CPUS=$(nproc)
$ make
# flashrom -p ch341a_spi -w build/coreboot.rom