MSTP update - 16: hard-linking CIST port configuration

#Hard-link ed #CIST #port #configuration through #standard #STP #port #entries in MSTP module. This will indicate the #MSTP CIST level attributes for the port s, like #CIST_ADMIN_PATH_COST, #CIST_MAC_ENABLED, #CIST_RESTRICTED_ROLE, #CIST_RESTRICTED_TCN,  etc ... This will reduce the memory requirement associated with the CIST port configuration The hard-linked entries enables accessing them directly through the standard STP port entries.

#802-1S #MSTP update 16 ...
[commit e699e09f66cd3189c087722361f1b274d61c66a9]