i2c-parport: Fix adapter list handling

Use a standard list with proper locking to handle the list of
adapters. Thankfully it only matters on systems with more than one
parallel port, which are very rare.

Thanks to Lukasz Kapiec for reporting the problem to me.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: stable@kernel.org
1 file changed