This feature is already supported in kernel. Add definition
and configuration in Makefile of OpenWRT.
It is tested on board Dibbler with processor V1605B.
Dmesg is as below.
--------------------------------------------
[ 0.317122] smpboot: CPU0: AMD Ryzen Embedded V1605B with Radeon
Vega Gfx (family: 0x17, model: 0x11, stepping: 0x0)
[ 8.227270] libphy: amd-xgbe-mii: probed
[ 8.228189] amd-xgbe 0000:02:00.1 eth0: net device enabled
[ 8.228999] libphy: amd-xgbe-mii: probed
[ 8.229921] amd-xgbe 0000:02:00.2 eth1: net device enabled
.....
[ 11.760869] br-lan: port 1(eth0) entered blocking state
[ 11.761365] br-lan: port 1(eth0) entered disabled state
[ 11.762019] device eth0 entered promiscuous mode
[ 11.785285] 8021q: adding VLAN 0 to HW filter on device eth1
[ 16.881431] amd-xgbe 0000:02:00.1 eth0: Link is Up - 1Gbps/Full -
flow control off
[ 16.882108] br-lan: port 1(eth0) entered blocking state
[ 16.882583] br-lan: port 1(eth0) entered forwarding state
[ 16.883249] IPv6: ADDRCONF(NETDEV_CHANGE): br-lan: link becomes ready
-----------------------------------------------
Signed-off-by: Zheng Bao <fishbaozi@gmail.com>