"The architectures that are gone are blackfin, cris, frv, m32r, metag,mn10300, score, and tile. And the new architecture is the nds32 (Andes Technology 32-0bit RISC architecture)."

here is the list of survivors: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/lin...

after 4.17.rc-1 linux still supports 23 archs.