tools/power/x86/intel-speed-select: Prevent CPU 0 offline

Kernel 6.5 version deprecated CPU 0 hotplug. This will cause all
requests to fail to offline CPU 0. Check version number of kernel
and ignore CPU 0 hotplug request with debug aid to use cgroup
isolation feature for CPU 0.

Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>