Add support for the PWM controller found in the Amlogic SoCs. This
driver supports the Meson8b and GXBB SoCs.
Signed-off-by: NNeil Armstrong <narmstrong@baylibre.com>
Tested-by: NMartin Blumenstingl <martin.blumenstingl@googlemail.com>
Tested-by: NJerome Brunet <jbrunet@baylibre.com>
Signed-off-by: NThierry Reding <thierry.reding@gmail.com>