linux-phytec-fsl

pwm: twl: Use to_twl() instead of container_of()

Always use to_twl() for converting into private data instead of
container_of().

Signed-off-by: Johannes Thumshirn <morbidrsa@gmail.com>
Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>