pwm: meson: Add support for Amlogic S4 PWM

Add support for Amlogic S4 PWM.

Signed-off-by: Junyi Zhao <junyi.zhao@amlogic.com>
Signed-off-by: Kelvin Zhang <kelvin.zhang@amlogic.com>
Reviewed-by: George Stark <gnstark@salutedevices.com>
Link: https://lore.kernel.org/r/20240613-s4-pwm-v8-1-b5bd0a768282@amlogic.com


Signed-off-by: Uwe Kleine-König <ukleinek@kernel.org>