x86: mpparse and cstate need to use 32bit apic id

x86: mpparse and cstate need to use 32bit apic id

Instead of going with mpc_config_processor struct.
that field ony have 8 bits.

We should not change that struct, because it is shared with mptable.

Also need to increase MAX_APICS.

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Rather than using a fixed value of 512, make this scale with NR_CPUS
(which obviously still doesn't cover all theoretically possible
systems, but at least allows some build time control).

Signed-off-by: Jan Beulich <jbeulich@novell.com>