[ros-svn] [hpoussin] 14139: Saveliy Tretiakov <saveliyt@mail.ru>

[hpoussin at svn.reactos.com]

Saveliy Tretiakov <saveliyt at mail.ru>
- Only one file may be open on a port at any given time
- Implemented IOCTL_SERIAL_GET_STATS and IOCTL_SERIAL_CLEAR_STATS


Updated files:
trunk/reactos/drivers/dd/serial/close.c
trunk/reactos/drivers/dd/serial/create.c
trunk/reactos/drivers/dd/serial/devctrl.c
trunk/reactos/drivers/dd/serial/misc.c
trunk/reactos/drivers/dd/serial/pnp.c
trunk/reactos/drivers/dd/serial/rw.c
trunk/reactos/drivers/dd/serial/serial.h