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/board/keymile/pg-wcom-ls102xa/MAINTAINERS b/board/keymile/pg-wcom-ls102xa/MAINTAINERS
index e1bc90a..26b2023 100644
--- a/board/keymile/pg-wcom-ls102xa/MAINTAINERS
+++ b/board/keymile/pg-wcom-ls102xa/MAINTAINERS
@@ -6,5 +6,8 @@
 F:	board/keymile/pg-wcom-ls102xa/
 F:	include/configs/km/pg-wcom-ls102xa.h
 F:	include/configs/pg-wcom-seli8.h
+F:	include/configs/pg-wcom-expu1.h
 F:	configs/pg_wcom_seli8_defconfig
+F:	configs/pg_wcom_expu1_defconfig
 F:	arch/arm/dts/ls1021a-pg-wcom-seli8.dts
+F:	arch/arm/dts/ls1021a-pg-wcom-expu1.dts