Instead of global workqueue, use own one so that the users of this
driver can more conveniently use global one. This means GSM modem
can work better with the UART muxing driver.
Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
Create support for muxed UARTs which are attached to a real
UART and which use GSM 07.10 muxing protocol to create virtual
channels that can be run on top of the real UART.
Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>