One section collecting all constant defines.  Ifdef the asm
blocks for X86_32/64.
Signed-off-by: NHarvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: NIngo Molnar <mingo@elte.hu>
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
Reviewed-by: NVivek Goyal <vgoyal@redhat.com>