Provide configuration items to select individual backends. This
also allows to fine-tune the package dependencies.
In order to address #5637, we make this dep unconditionally
until upstream allow to opt-in/opt-out libavahi support.

Signed-off-by: Michael Heimpold <mhei@heimpold.de>

Signed-off-by: Michael Heimpold <mhei@heimpold.de>

- remove upstreamed patch
- remove dependency to libavahi-common which does not exist,
  seems that I have confused library name vs package name (fixes #5480)
(- only compile tested at the moment)

Signed-off-by: Michael Heimpold <mhei@heimpold.de>

At the moment, the description for libiio is hidden by the short one, which
is intended for iiod. Fix this by removing the redefinition.

Signed-off-by: Michael Heimpold <mhei@heimpold.de>

While at, add a missing word in the description of the -utils package.

(Only compile tested at the moment for mxs platform.)

Signed-off-by: Michael Heimpold <mhei@heimpold.de>

Signed-off-by: Stijn Tintel <stijn@linux-ipv6.be>

Signed-off-by: Michael Heimpold <mhei@heimpold.de>

Signed-off-by: Michael Heimpold <mhei@heimpold.de>

Signed-off-by: Michael Heimpold <mhei@heimpold.de>

Signed-off-by: Michael Heimpold <mhei@heimpold.de>

libiio is a library for interfacing with Linux's Industrial Input/Output (IIO)
subsystem. The Linux IIO subsystem is intended to provide support for devices
that in some sense are analog to digital or digital to analog converters.

Signed-off-by: Michael Heimpold <mhei@heimpold.de>