Enable support for qca8k switch used in Meraki MX65. This is required to
properly support preinit networking on this device, otherwise unit won't
be accessible in failsafe mode.
Signed-off-by: Lech Perczak <lech.perczak@gmail.com>
Link: https://github.com/openwrt/openwrt/pull/16634
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>