eth: bnxt: move and rename reset helpers

Move the reset helpers, subsequent patches will need some
of them on the Tx path.

While at it rename bnxt_sched_reset(), on more recent chips
it schedules a queue reset, instead of a fuller reset.

Link: https://lore.kernel.org/r/20230720010440.1967136-2-kuba@kernel.org


Reviewed-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>