[CPUFREQ] Longhaul - Initialise later.

Without this longhaul will always fail when compiled into kernel,
as it needs to initialise after the ACPI processor module.

I lost this when I was splitting patches. Sorry.

Signed-off-by: Rafa Bilski <rafalbilski@interia.pl>
Signed-off-by: Dave Jones <davej@redhat.com>