Add support for Amlogic meson A1 SoC family PWM.

Changes in v2:
  add patch with optional power-domains to pwm bindings;
  fix syntax in a1 bindigns patch:
  - use enum over const for amlogic,meson-a1-pwm beacuse adding more devices here
    are expected
  - leave only base compatible amlogic,meson-s4-pwm in check section
  dt_binding_check and dtbs_check run ok now;
  previos version: [1]

[1] https://lore.kernel.org/lkml/20240701130113.433169-3-gnstark@salutedevices.com/T/

George Stark (3):
  dt-bindings: pwm: amlogic: Add new bindings for meson A1 PWM
  dt-bindings: pwm: amlogic: Add optional power-domains
  arm64: dts: meson: a1: add definitions for meson PWM

 .../devicetree/bindings/pwm/pwm-amlogic.yaml  |   7 +
 arch/arm64/boot/dts/amlogic/meson-a1.dtsi     | 215 ++++++++++++++++++
 2 files changed, 222 insertions(+)

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2.25.1