dt-bindings: memory: mtk-smi: Rename clock to clocks

dt-bindings: memory: mtk-smi: Rename clock to clocks

The property "clock" should be rename to "clocks", and delete the "items",
the minItems/maxItems should not be put under "items".

Fixes: 27bb0e42855a ("dt-bindings: memory: mediatek: Convert SMI to DT schema")
Signed-off-by: Yong Wu <yong.wu@mediatek.com>
Acked-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20220113111057.29918-2-yong.wu@mediatek.com
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>