When IGNPAR is set in termios->c_iflag,  characters with
framing errors should be ignored.
Signed-off-by: NEric Nelson <eric.nelson@boundarydevices.com>
Reviewed-by: NPeter Hurley <peter@hurleysoftware.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>