cpu_boost: Only boost CPU0 and add safety checks

Signed-off-by: Sultanxda <sultanxda@gmail.com>
msm_thermal: Add CPU policy safety check

Signed-off-by: Sultanxda <sultanxda@gmail.com>
msm: cpufreq: Add cpufreq_cpu_get() safety check

Signed-off-by: Sultanxda <sultanxda@gmail.com>
Sultan_pyramid_defconfig: v1.8.0