dt-bindings: clk: amlogic,a1-pll-clkc: expose all clock ids

Due to a policy change in clock ID bindings handling, expose
all the "private" clock IDs to the public clock dt-bindings
to move out of the previous maintenance scheme.

This refers to a discussion at [1] & [2] with Krzysztof about
the issue with the current maintenance.

It was decided to move every A1 pll ID to the public clock
dt-bindings headers to be merged in a single tree so we
can safely add new clocks without having merge issues.

[1] https://lore.kernel.org/all/c088e01c-0714-82be-8347-6140daf56640@linaro.org/
[2] https://lore.kernel.org/all/2fabe721-7434-43e7-bae5-088a42ba128d@app.fastmail.com/

Reviewed-by: Dmitry Rokosov <ddrokosov@sberdevices.ru>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://lore.kernel.org/r/20230607-topic-amlogic-upstream-clkid-public-migration-v2-13-38172d17c27a@linaro.org
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>

dt-bindings: clock: meson: add A1 PLL clock controller bindings

Add the documentation and dt bindings for Amlogic A1 PLL clock
controller.
Also include new A1 clock controller dt bindings to MAINTAINERS.

Signed-off-by: Jian Hu <jian.hu@amlogic.com>
Signed-off-by: Dmitry Rokosov <ddrokosov@sberdevices.ru>
Reviewed-by: Rob Herring <robh@kernel.org>
Reviewed-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Link: https://lore.kernel.org/r/20230523135351.19133-4-ddrokosov@sberdevices.ru
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>