The kernel unnecessarily prevents late microcode loading when SMT is
disabled.  It should be safe to allow it if all the primary threads are
online.
Signed-off-by: NJosh Poimboeuf <jpoimboe@redhat.com>
Acked-by: NBorislav Petkov <bp@suse.de>
Signed-off-by: NDavid Woodhouse <dwmw@amazon.co.uk>