[media] DT: export of_get_next_parent() for use by modules: fix modular V4L2
Currently modular V4L2 build with enabled OF is broken dur to the of_get_next_parent() function being unavailable to modules. Export it to fix the build. Signed-off-by: NGuennadi Liakhovetski <g.liakhovetski@gmx.de> Acked-by: NGrant Likely <grant.likely@linaro.org> Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>
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