Add pwm node and pinctrl to BananaPi R3 devicetree.
Signed-off-by: Frank Wunderlich <frank-w@public-files.de>
Link: https://lore.kernel.org/r/20230421132047.42166-6-linux@fw-web.deSigned-off-by: Matthias Brugger <matthias.bgg@gmail.com>