atl1c: prepare for multiple rx queues

Move napi and other per queue members into per rx queue struct.
Allocate max rx queues that any hw supported by the driver might have.
Patch that actually enables multiple rx queues will follow.

Signed-off-by: Gatis Peisenieks <gatis@mikrotik.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>