docs: ABI: Document new timecard sysfs nodes.

Add documentation for the tod_correction, clock_status_drift,
and clock_status_offset nodes.

Signed-off-by: Jonathan Lemon <jonathan.lemon@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jonathan Lemon 2022-03-02 13:34:59 -08:00 • committed by David S. Miller
commit 4db073174f