From: Vinicius Costa Gomes <vinicius.gomes@intel.com>
Date: Tue, 28 Jan 2020 15:52:26 -0800

When any offload mode is enabled, users had to specify the
"flags" parameter when adding a new "admin" schedule.

This fix allows that parameter to be omitted when adding a new
schedule.

This will make that we have one source of truth for 'flags'.

Fixes: 4cfd5779bd6e ("taprio: Add support for txtime-assist mode")
Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@intel.com>
Acked-by: Vladimir Oltean <vladimir.oltean@nxp.com>

This will visibly change behavior for a feature in a released
kernel (v5.3 and later) and it means that newer tools will do
things that don't work in older kernels.

I think your opportunity to adjust these semantics, has therefore,
long passed.

Sorry.