Doc: review of QtSensors

Minor corrections in compatmap.qdoc

Task-number: QTBUG-32173
Change-Id: Ic4f881449e65c2d6889f0e217d251214997a8a56
Reviewed-by: Martin Smith <martin.smith@digia.com>
Reviewed-by: Laszlo Papp <lpapp@kde.org>
Reviewed-by: Jerome Pasion <jerome.pasion@digia.com>