These changes broke the creation of the 'linux-modules-database' for all kernel
series besides 5.15, 5.4, and 5.10, like this:
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gnu/build/linux-modules.scm:257:5: kernel module not found "framebuffer_coreboot" "/gnu/store/yff45fr6q93mw44zdql9ffr95zcvwxcn-linux-libre-4.9.299/lib/modules"
------
We should support the coreboot framebuffer, but we need to test that change more
completely before deploying it.
This effectively reverts the following commits:
1dfe8c3721 "gnu: linux-libre: Build simplefb into all x86{,_64} kernels."
bc09e7ab56 "gnu: linux-libre: Support the Coreboot framebuffer."
Fixes <https://issues.guix.gnu.org/52667> "System reconfiguration fails to build
linux-modules.drv".
fd6cfbc05a