staging/android: make sw_ioctl info internal to sw_sync.c

We don't want to export this from the kernel. This is interface is only
for testing and debug. So testers shall copy the ioctl info in their own
projects.

Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Sumit Semwal <sumit.semwal@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>