dt-bindings: clock: ti: remove unstable remark

Several TI SoC clock bindings were marked as work-in-progress / unstable
between 2013-2016, for example in commit f60b1ea5 ("CLK: TI: add
support for gate clock").  It was enough of time to consider them stable
and expect usual ABI rules.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Acked-by: Stephen Boyd <sboyd@kernel.org>
Acked-by: Rob Herring <robh@kernel.org>
Acked-by: Tony Lindgren <tony@atomide.com>
Link: https://lore.kernel.org/r/20240224091236.10146-2-krzysztof.kozlowski@linaro.org


Signed-off-by: Rob Herring <robh@kernel.org>