mlxsw: pci: Limit number of entries being sent in single MAP_FA cmd

Firmware accepts only limited number of mapping entries for MAP_FA
command. In order to prevent overflow, introduce a limit and in case the
number of entries is bigger, call MAP_FA multiple times.

Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>