[patch 1/7] staging: speakup: add send_xchar and tiocmset methods

[Okash Khawaja]

On Thu, Apr 13, 2017 at 06:41:29PM +0100, Okash Khawaja wrote:
> This adds two methods to spk_synth struct: send_xchar and tiocmset, and
> creates serial implementation for each of them. It takes existing code
> in apollo, audptr and spkout which already fits the behaviour of
> send_xchar and tiocmset. In follow-up patches there will be TTY-based
> implementations of these methods. Then migrating the synths to TTY will
> include repointing these methods to their TTY implementations
> 
> Rest of the changes simply make use of serial implementation of these two
> functions.
> 
> Signed-off-by: Okash Khawaja <okash.khawaja at gmail.com>
> Reviewed-by: Samuel Thibault <samuel.thibault at ens-lyon.org>

I'll fix the at symbol across the patchset - copy-paste mistake.