If rfcomm_dlc_open() fails, set tty into error state which returns
-EIO from reads and writes.
Signed-off-by: NPeter Hurley <peter@hurleysoftware.com>
Tested-By: NAlexander Holler <holler@ahsoftware.de>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>