[PATCH] x86-64: include/asm-x86_64/cpufeature.h isn't a userspace header

Nothing in include/asm-x86_64/cpufeature.h is part of the
userspace<->kernel interface.

Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Andi Kleen <ak@suse.de>