sal-stack-lwip has a dependency on systick

Systick should not be required for ethernet.

the systick handler in sal-stack-lwip calls `eth_arch_timer_callback` and increments a `systick_ms` counter.
The `eth_arch_timer_callback` API should be called from a minar periodic task.
The APIs that require `systick_ms` should use another API to provide it, e.g. lptimer, or minar_platform.