linux-imx

arm64: dts: rockchip: Add pwm nodes for rk3328

There are 4 pwm channels built in rk3328 soc, need to configure
the both APB clock and bus clock.

Signed-off-by: David Wu <david.wu@rock-chips.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>