device-drivers/ltp_acpi_cpufreq: move it to cpufreq/cpufreq_boost

Signed-off-by: Alexey Kodanev <alexey.kodanev@oracle.com>
device-drivers/cpufreq: add intel_pstate driver to boost test

Signed-off-by: Alexey Kodanev <alexey.kodanev@oracle.com>
Reviewed-by: Cyril Hrubis <chrubis@suse.cz>