board/km: add support for expu1 design based on nxp

The EXPU1 design is a new 40G capable ethernet service unit card for
Hitachi-Powergrids wired-com product lines.

The base SoC is same as for already added SELI8 card, consequently the
already added u-boot support for SELI8 is reused.

Signed-off-by: Rainer Boschung <rainer.boschung@hitachi-powergrids.com>
Signed-off-by: Aleksandar Gerasimovski <aleksandar.gerasimovski@hitachi-powergrids.com>
[Fixed new line error at EOF]
Signed-off-by: Priyanka Jain <priyanka.jain@nxp.com>
diff --git a/arch/arm/dts/Makefile b/arch/arm/dts/Makefile
index 0960682..0d14394 100644
--- a/arch/arm/dts/Makefile
+++ b/arch/arm/dts/Makefile
@@ -411,6 +411,7 @@
 	ls1021a-twr-duart.dtb ls1021a-twr-lpuart.dtb \
 	ls1021a-iot-duart.dtb ls1021a-tsn.dtb
 dtb-$(CONFIG_TARGET_PG_WCOM_SELI8) += ls1021a-pg-wcom-seli8.dtb
+dtb-$(CONFIG_TARGET_PG_WCOM_EXPU1) += ls1021a-pg-wcom-expu1.dtb
 
 dtb-$(CONFIG_FSL_LSCH3) += fsl-ls2080a-qds.dtb \
 	fsl-ls2080a-qds-42-x.dtb \