arm64: dts: librem5: Add interconnect name for DCSS

Otherwise it fails to probe indicated by

    [   30.524888] imx-dcss 32e00000.display-controller: No interconnect support may cause display underflows!

Closes: torvalds#262
Signed-off-by: Guido Günther <agx@sigxcpu.org>

arch/arm64/boot/dts/freescale/imx8mq.dtsi

@@ -1233,6 +1233,7 @@
 				assigned-clock-rates = <800000000>,
 						       <400000000>;
 				interconnects = <&noc IMX8MQ_ICM_DCSS &noc IMX8MQ_ICS_DRAM>;
+				interconnect-names = "dram";
 				status = "disabled";
 				dcss_dsi_out: port@0 {
 					dcss_mipi_dsi: endpoint {