CircleCI & Makefile: fixes needed for coreboot-git/cache reuse

TODO: revert circleci config after making sure rebuilding from cache from CI works

CircleCI: depend on NV41 for save_cache
Makefile: consider that coreboot-git is now shared between forks on x86 (Nitrokey/Purism share build/x86/coreboot-git now)
modules/coreboot: have clevo/nv boards based on dasharo fork and apply clevo_patches

Addressesses requested change at linuxboot#1417 (review)

co-Signed-off-by: Krystian Hebel <krystian.hebel@3mdeb.com> and insurgo@riseup.net

Author: tlaurion