Remove two arguments of ice_aq_move_sched_elems().
Last of them was always NULL, and @grps_req was always 1.

Assuming @grps_req to be one, allows us to use DEFINE_FLEX() macro,
what removes some need for heap allocations.
Signed-off-by: Przemek Kitszel <przemyslaw.kitszel@intel.com>
Link: https://lore.kernel.org/r/20230912115937.1645707-4-przemyslaw.kitszel@intel.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>