arm64: dts: rockchip: Drop interrupts property from rk3328 pwm-rockchip node

The binding doesn't define interrupts and adding such a definition was
refused because it's unclear how they should ever be used and the
relevant registers are outside the PWM range. So drop them fixing
several dtbs_check warnings.
Signed-off-by: Johan Jonker <jbx6244@gmail.com>
Link: https://lore.kernel.org/r/5551846d-62cd-4b72-94f4-07541e726c37@gmail.comSigned-off-by: Heiko Stuebner <heiko@sntech.de>

arch/arm64/boot/dts/rockchip/rk3328.dtsi

@@ -488,7 +488,6 @@ pwm2: pwm@ff1b0020 {
 	pwm3: pwm@ff1b0030 {
 		compatible = "rockchip,rk3328-pwm";
 		reg = <0x0 0xff1b0030 0x0 0x10>;
-		interrupts = <GIC_SPI 50 IRQ_TYPE_LEVEL_HIGH>;
 		clocks = <&cru SCLK_PWM>, <&cru PCLK_PWM>;
 		clock-names = "pwm", "pclk";
 		pinctrl-names = "default";