Bridge multicast update

Added support for #dynamic #configuration on max_number_of_ports in #bridge #multicast #group #framework on ethernet module. This will enable to dynamically set the size of #member #egress #ports and #learned #ports listing for each bridge #multicast-group. This removes the static allocation of max size of member port listing and reduces the memory requirement for the member port list. According to the configured port density on the particular bridge #component the multicast group member port lists will be dynamically allocated.

#Ethernet update 57 ...
[commit 22829a8bde30636b7cf24d9713574aefaa31833d]