os: unexport screen saver timer functions
These functions aren't supposed to be used by drivers, so move them out of the public API.
Signed-off-by: Enrico Weigelt, metux IT consult info@metux.net
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These functions aren't supposed to be used by drivers, so move them out of the public API.
Signed-off-by: Enrico Weigelt, metux IT consult info@metux.net