Add parsed flag

Add parsed flag to indicate that var data has been fully parsed. This
is used to mark rest of data (if any) as unused.
Parse set var curr_etheraddr
Parse set var mcast_list
Parse set var arp_hostip
Parse data for WLC commands where data is of uint32 type

Parse data for WLC cmds where data is of integer type.
  Type based on grepping linux driver sources for:
   - brcmf_fil_cmd_int_get
   - brcmf_fil_cmd_int_set