drivers: led: Implemented PCA9533 driver with PM support

• Supports led_on/off, led_set_brightness (0–100 %, 152 Hz default),
  and led_blink (7 ms – 1.685 s) with automatic sharing of the two
  on-chip PWM engines; returns –EBUSY when a third distinct pair is
  requested.

• Includes basic runtime-PM boilerplate to honour power-domain control;
  the device itself has no dedicated low-power states.

Signed-off-by: Van Petrosyan <van.petrosyan@sensirion.com>

Author: petrosyan-van

drivers/led/CMakeLists.txt

@@ -21,10 +21,11 @@ zephyr_library_sources_ifdef(CONFIG_LP5562 lp5562.c)
 zephyr_library_sources_ifdef(CONFIG_LP5569 lp5569.c)
 zephyr_library_sources_ifdef(CONFIG_MODULINO_BUTTONS_LEDS modulino_buttons_leds.c)
 zephyr_library_sources_ifdef(CONFIG_NCP5623 ncp5623.c)
+zephyr_library_sources_ifdef(CONFIG_PCA9533 pca9533.c)
 zephyr_library_sources_ifdef(CONFIG_PCA9633 pca9633.c)
 zephyr_library_sources_ifdef(CONFIG_TLC59108 tlc59108.c)
 # zephyr-keep-sorted-stop
 
-zephyr_library_sources_ifdef(CONFIG_LED_SHELL   led_shell.c)
+zephyr_library_sources_ifdef(CONFIG_LED_SHELL led_shell.c)
 
-zephyr_library_sources_ifdef(CONFIG_USERSPACE   led_handlers.c)
+zephyr_library_sources_ifdef(CONFIG_USERSPACE led_handlers.c)