dt-bindings: mmc: arasan,sdci: Drop clock-output-names from dependencies

dt-bindings: mmc: arasan,sdci: Drop clock-output-names from dependencies

The schema defines dependency only of clock-output-names on #clock-cells.
The dependency in opposite direction - requirement of clock-output-names
if #clock-cells is defined - should be explicitly included in the
bindings.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20211004151646.73599-1-krzysztof.kozlowski@canonical.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>