Comment # 56 on bug 75992 from Alexander Tsoy

(In reply to comment #55)

Without commit [1] new microcode (BONAIRE_mc2.bin) is not loaded. This commit
is currently included only in >=3.15-rc2

[1]
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=277babc374f6ecab6af182554f5d9f35a7768755