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There are lot of drivers using of_get_child_by_name() followed by of_device_is_available() to find the available child node by name for a given parent. Provide a helper for these users to simplify the code. Suggested-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: Rob Herring <robh@kernel.org> Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com> Reviewed-by: Simon Horman <horms@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>