[ATM]: Remove dead ATM_TNETA1570 option.
This patch removes the unconverted ATM_TNETA1570 option that also lacks
any code in the kernel.
Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
authored by Adrian Bunk and committed by David S. Miller 52a91071 caff5b6a