kernel: disable intel p-state.

Our userspace tools doesn't support this.
samba: security update to 3.6.24.

This is a security releases in order to address
CVE-2014-0244 (Denial of service - CPU loop) and
CVE-2014-3493 (Denial of service - Server crash/memory corruption).
syslinux: add serial console output.
kernel: fix typo in cfg.
samba: fix version.