mlxsw: spectrum_buffers: silence uninitialized warning

Static checkers and runtime checkers such as KMSan will complain that
we do not initialize the last 6 bytes of "cb_priv".  The caller only
uses the first two bytes so it doesn't cause a runtime issue.  Still
worth fixing though.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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

@@ -1583,7 +1583,7 @@ int mlxsw_sp_sb_occ_snapshot(struct mlxsw_core *mlxsw_core,
 {
 	struct mlxsw_sp *mlxsw_sp = mlxsw_core_driver_priv(mlxsw_core);
 	struct mlxsw_sp_sb_sr_occ_query_cb_ctx cb_ctx;
-	unsigned long cb_priv;
+	unsigned long cb_priv = 0;
 	LIST_HEAD(bulk_list);
 	char *sbsr_pl;
 	u8 masked_count;