led: led_pwm: Add a driver for LEDs connected to PWM

Add a driver which allows to use of LEDs connected
to PWM (Linux compatible).
MAINTAINERS: add i.vozvakhov as a maintainer of leds-pwm
C(required during new functionality adding).

Signed-off-by: Ivan Vozvakhov <i.vozvakhov@corp.mail.ru>
diff --git a/MAINTAINERS b/MAINTAINERS
index 6142504..7a9e315 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -899,6 +899,12 @@
 F:	doc/kwboot.1
 F:	tools/kwb*
 
+LED
+M:	Ivan Vozvakhov <i.vozvakhov@vk.team>
+S:	Supported
+F:	doc/device-tree-bindings/leds/leds-pwm.txt
+F:	drivers/led/led_pwm.c
+
 LOGGING
 M:	Simon Glass <sjg@chromium.org>
 S:	Maintained