cpuidle: teo: Clarify two code comments

Rewrite two code comments suposed to explain its behavior that are too
concise or not sufficiently clear.

No functional impact.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Christian Loehle <christian.loehle@arm.com>
Tested-by: Aboorva Devarajan <aboorvad@linux.ibm.com>
Tested-by: Christian Loehle <christian.loehle@arm.com>
Link: https://patch.msgid.link/8472971.T7Z3S40VBb@rjwysocki.net


[ rjw: Fixed 2 typos in new comments ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>