layerscape: Add connman config to disable links to ls1028a switch

The ls1028a SoC has an embedded switch, which is connected to end1 and end8. Connman is seeing these links as UP and attempting to configure them, which results in an overall network configuration that doesn't work. For now, disable connection to these devices so that we have working networking on the other exposed 1G port.

Signed-off-by: Martyn Welch martyn.welch@collabora.com