xinput: struct DeviceClass: full support

xinput: struct DeviceClass: full support

replace uninterpreted_data by switch-case

this is needed by struct XIDeviceInfo which is needed by reply XIQueryDevice.

changes for V2 of this patch:
* remove the pad after "sourceid" because that space is used by the first two bytes defined inside each case of the bit-case.
  ( noticed that problem by testing )

changes for V3 of this patch:
* adapt to removal of patches "proto 6/7 and 7/7" in patchset ListInputDevices:
  adjust linenumbers in the patch accordingly

spec:
http://cgit.freedesktop.org/xorg/proto/inputproto/tree/specs/XI2proto.txt?id=inputproto-2.3.1#n752

Note:
The spec lists TOUCHCLASS.num_touches as a CARD16 but the XI2proto.h header and the xml
use the type CARD8 for it.
Is this a spec bug?

code:
http://cgit.freedesktop.org/xorg/proto/inputproto/tree/XI2.h?id=inputproto-2.3.1#n138
http://cgit.freedesktop.org/xorg/proto/inputproto/tree/XI2proto.h?id=inputproto-2.3.1#n117

Message-ID: <5444E167.8090702@DemoRecorder.com>
Patch-Thread-Subject: [Xcb] xinput: xml-fixes possible with new generator features
Patch-Set: XmlFixesNewGenerator
Patch-Number: proto 06/10
Patch-Version: V3
Signed-off-by: Christian Linhart <chris@DemoRecorder.com>