r8169: remove member align from struct rtl_cfg_info

Since commit 6f0333b8 "r8169: use 50% less ram for RX ring" member
align isn't used any longer, so remove it.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>