MAINTAINERS: Add entry for uDPU board

This adds an entry maintainer for the micro-DPU (uDPU) board which is
based on Armada-3720 SoC.

micro-DPU is the single-port FTTdp distribution point unit made by
Methode Electronics which offers complete modularity with replaceable SFP
modules both for uplink and downlink (G.hn over twisted-pair, G.hn over
coax, 1G and 2.5G Ethernet over Cat-5e cable).

[gregory: maintainer part extract from initial "arm64: dts: marvell: Add
device tree for uDPU board" pacth]
Signed-off-by: Vladimir Vid <vladimir.vid@sartura.hr>
Signed-off-by: Gregory CLEMENT <gregory.clement@bootlin.com>

MAINTAINERS

@@ -9849,6 +9849,11 @@ F:	drivers/media/platform/meson/ao-cec.c
 F:	Documentation/devicetree/bindings/media/meson-ao-cec.txt
 T:	git git://linuxtv.org/media_tree.git
 
+METHODE UDPU SUPPORT
+M:	Vladimir Vid <vladimir.vid@sartura.hr>
+S:	Maintained
+F:	arch/arm64/boot/dts/marvell/armada-3720-uDPU.dts
+
 MICROBLAZE ARCHITECTURE
 M:	Michal Simek <monstr@monstr.eu>
 W:	http://www.monstr.eu/fdt/