dt-bindings: phy-mtk-tphy: remove unused u3phya_ref clock

The u3phya_ref clock is already moved into sub-node, and
renamed as ref clock, no used anymore now, so remove it
to avoid confusion

Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
This commit is contained in:
Chunfeng Yun 2020-02-11 11:21:08 +08:00 • committed by Kishon Vijay Abraham I
commit ed4df1e397