LF-4662 arm64: dts: freescale: remove the clock property from ispdwp_pd

It is not necessary to add the clocks for ispdwp_pd, so remove
it.

Signed-off-by: Jacky Bai <ping.bai@nxp.com>
Reviewed-by: Robby Cai <Robby.Cai@nxp.com>

arch/arm64/boot/dts/freescale/imx8mp.dtsi

@@ -467,7 +467,6 @@ ispdwp_pd: power-domain@14 {
 			domain-index = <14>;
 			domain-name = "ispdwp";
 			parent-domains = <&mediamix_pd>;
-			clocks = <&clk IMX8MP_CLK_MEDIA_ISP>;
 		};
 
 		mipi_phy1_pd: mipiphy1-pd {