Problem has been identified with Ip6ProcessRouterAdvertise() when
Router Advertise packet contains options with malicious/invalid
'Length' field. This can lead to platform entering infinite loop
when processing options from that packet.
Cc: Jiaxin Wu <jiaxin.wu@intel.com> Cc: Siyuan Fu <siyuan.fu@intel.com> Signed-off-by: Maciej Rabeda <maciej.rabeda@linux.intel.com> Reviewed-by: Siyuan Fu <siyuan.fu@intel.com>