arm64: dts: rockchip: drop interrupt-names property from rk3588s dfi

The dfi binding does not specify interrupt names, with the interrupts
just specifying channels 0-x. So drop the unspecified property.

Fixes: 5a6976b1 ("arm64: dts: rockchip: Add DFI to rk3588s")
Reported-by: Jagan Teki <jagan@edgeble.ai>
Signed-off-by: Heiko Stuebner <heiko.stuebner@cherry.de>
Link: https://lore.kernel.org/r/20231201134859.322491-1-heiko@sntech.de

arch/arm64/boot/dts/rockchip/rk3588s.dtsi

@@ -1362,7 +1362,6 @@ dfi: dfi@fe060000 {
 			     <GIC_SPI 38 IRQ_TYPE_LEVEL_HIGH 0>,
 			     <GIC_SPI 48 IRQ_TYPE_LEVEL_HIGH 0>,
 			     <GIC_SPI 58 IRQ_TYPE_LEVEL_HIGH 0>;
-		interrupt-names = "ch0", "ch1", "ch2", "ch3";
 		rockchip,pmu = <&pmu1grf>;
 	};