Merge tag 'usb-serial-3.18-rc6' of...

Merge tag 'usb-serial-3.18-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/johan/usb-serial into usb-linus

Johan writes:

USB-serial fixes for v3.18-rc6

Three fixes for bugs related to TTY error reporting, which can to lead
to data being dropped by the line discipline.

Included is also some new device ids for ftdi_sio and cp210x.

Signed-off-by: Johan Hovold <johan@kernel.org>