This enables the Amlogic Meson PWM controller. It is used for a dimmable
LED on some devices. Additionally some devices use it to generate the
32.768 kHz (low power oscillator) clock.
Signed-off-by: NMartin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: NKevin Hilman <khilman@baylibre.com>