pcilynx: reduce stack usage in add_card(),
  from 800 to 308 bytes (on i386), by dynamically allocating
          struct i2c_adapter i2c_adapter;  /* 492 bytes */
Signed-off-by: Randy Dunlap <rddunlap@osdl.org>
Signed-off-by: Jody McIntyre <scjody@modernduck.com>