mlxsw: spectrum_router: Remove FIB info from FIB entry struct

After the previous changes, the FIB info is embedded in every nexthop
group struct, which in turn is embedded in every FIB entry struct.

We can therefore safely remove the FIB info from the entry struct. This
has the added advantage of making the router-related structs more
generic and suitable for use with IPv6 offloads.
Signed-off-by: NIdo Schimmel <idosch@mellanox.com>
Signed-off-by: NJiri Pirko <jiri@mellanox.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c

@@ -128,7 +128,6 @@ struct mlxsw_sp_fib_entry {
 	enum mlxsw_sp_fib_entry_type type;
 	unsigned int ref_count;
 	struct mlxsw_sp_vr *vr;
-	struct fib_info *fi;
 	struct list_head nexthop_group_node;
 	struct mlxsw_sp_nexthop_group *nh_group;
 };
@@ -1755,7 +1754,7 @@ mlxsw_sp_router_fib4_entry_fini(struct mlxsw_sp *mlxsw_sp,
 				struct mlxsw_sp_fib_entry *fib_entry)
 {
 	if (fib_entry->type != MLXSW_SP_FIB_ENTRY_TYPE_TRAP)
-		fib_info_offload_dec(fib_entry->fi);
+		fib_info_offload_dec(fib_entry->nh_group->key.fi);
 }
 
 static struct mlxsw_sp_fib_entry *
@@ -1788,7 +1787,6 @@ mlxsw_sp_fib_entry_get(struct mlxsw_sp *mlxsw_sp,
 		goto err_fib_entry_create;
 	}
 	fib_entry->vr = vr;
-	fib_entry->fi = fi;
 	fib_entry->ref_count = 1;
 
 	err = mlxsw_sp_router_fib4_entry_init(mlxsw_sp, fen_info, fib_entry);