oFono gets multiplexer support

[Bastian, Waldo]

> Hi All,
> 
> Just to let you know the initial support for multiplexing has been added
> to oFono.  The multiplexer infrastructure is fully customizable through
> the use of drivers.  Two drivers are currently supported, GSM 27.010 Basic
> and Advanced modes.

Is it a correct understanding that modem's that provide kernel drivers that provide multiple TTY's and do the multiplexing in kernel space will not need to integrate with any of this and can just create multiple GAtChat objects in their oFono modem driver?

I notice that g_at_mux_create_channel() doesn't take a DLC as argument. So when the calypso driver defines
	#define VOICE_DLC 0
the result will be that DLC 1 will be used for VOICE_DLC, correct?

Cheers,
Waldo