arm64: zynqmp: add MAINTAINERS entry for Avnet UltraZed-EV

The board was added without adding a MAINTAINERS entry.

Fixes:

  $ ./tools/genboardscfg.py -f
  WARNING: no status info for 'avnet_ultrazedev_cc_v1_0_ultrazedev_som_v1_0'
  WARNING: no maintainers for 'avnet_ultrazedev_cc_v1_0_ultrazedev_som_v1_0'
  $

Reported-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Luca Ceresoli <luca@lucaceresoli.net>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
diff --git a/board/xilinx/zynqmp/MAINTAINERS b/board/xilinx/zynqmp/MAINTAINERS
index efc1d35..04fc7f3 100644
--- a/board/xilinx/zynqmp/MAINTAINERS
+++ b/board/xilinx/zynqmp/MAINTAINERS
@@ -7,3 +7,9 @@
 F:	include/configs/xilinx_zynqmp*
 F:	configs/xilinx_zynqmp*
 F:	configs/avnet_ultra96_rev1_defconfig
+
+ARM ZYNQMP AVNET ULTRAZED EV BOARD
+M:	Luca Ceresoli <luca@lucaceresoli.net>
+S:	Maintained
+F:	arch/arm/dts/avnet-ultrazedev-*
+F:	configs/avnet_ultrazedev_cc_v1_0_ultrazedev_som_v1_0_defconfig