While reviewing my 2.4 backport of the 2.6 cpu capabilities (including
the Via RNG support), Mikael Pettersson noticed a bug in both my
backport, and 2.6:  when NCAPINTS (x86_capability array size) is
increased, one must adjust the offset in arch/i386/kernel/head.S also.

Contributed by Mikael Pettersson.