x86, mce: add missing __cpuinit tags

mce_cap_init() and mce_cpu_quirks() can be tagged with __cpuinit.

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Reviewed-by: Andi Kleen <andi@firstfloor.org>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>