Note about PTP fast event only mentions availability for ordinary and boundary clock types, not grandmaster clock

Always

The first note in https://docs.openshift.com/container-platform/4.14/networking/ptp/using-ptp-events.html#cnf-about-ptp-and-clock-synchronization_using-ptp-hardware-fast-events-framework mentions that "PTP fast event notifications are available for network interfaces configured to use PTP ordinary clocks or PTP boundary clocks.". Since 4.14.6, grandmaster clock should also be supported (if I'm not mistaken).

Grandmaster clock support for PTP fast event notifications is stated in the documentation.