Makefile: Add support for Elbrus (e2k) architecture

Signed-off-by: Anton Samsonov <devel@zxlab.ru>
Change-Id: Ifc834e943ae93c59447afc86454b22ca662d3ef6
Original-Reviewed-on: https://review.coreboot.org/c/flashrom/+/66426
Original-Reviewed-by: Thomas Heijligen <src@posteo.de>
Reviewed-on: https://review.coreboot.org/c/flashrom-stable/+/72342
Reviewed-by: Nico Huber <nico.h@gmx.de>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
2 files changed