CPU forwarding bit in VLAN masks
When setting forwarding mask for VLANs, the mask also applies to the
port dedicated to CPU. With the current HDL arrangement, if forwarding
bit to CPU is not set for each active VLAN ID, for this VID the frames
will not be forwarded to CPU, consequently (due to other not-fortunate
feature: now wild-card MAC setting: PTP MAC needs to be set for each
VID) in the following usecase the PTP will not work: the port set to tag
incoming frames with VID for which the CPU bit mask is not set. The
solution would be to be-default set CPU bit for all VID masks that are
added