dt-bindings: remoteproc: ti,davinci: remove unstable remark

TI Davinci remoteproc bindings were marked as work-in-progress /
unstable in 2017 in commit ae67b800 ("dt-bindings: remoteproc: Add
bindings for Davinci DSP processors"). Almost seven years is enough, so
drop the "unstable" remark and expect usual ABI rules.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Acked-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20240224091236.10146-3-krzysztof.kozlowski@linaro.org


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