net: microchip: sparx5: Use chain ids without offsets when enabling rules

This improves the check performed on linked rules when enabling or
disabling them.  The chain id used must be the chain id without the offset
used for linking the rules.

Signed-off-by: Steen Hegelund <steen.hegelund@microchip.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>