arm64: zynqmp: Sync licenses with Linux kernel

There is difference between licenses in the Linux kernel and there
shouldn't be any diff because all changes are coming from the same source
at the same time. The difference is really in a time when they were
upstreamed. That's why sync it up.

Signed-off-by: Michal Simek <michal.simek@amd.com>
Link: https://lore.kernel.org/r/813b29378083153b67c60772f28cd2613519f338.1695378830.git.michal.simek@amd.com
diff --git a/arch/arm/dts/avnet-ultra96-rev1.dts b/arch/arm/dts/avnet-ultra96-rev1.dts
index 96a6403..4c1bd69 100644
--- a/arch/arm/dts/avnet-ultra96-rev1.dts
+++ b/arch/arm/dts/avnet-ultra96-rev1.dts
@@ -2,7 +2,7 @@
 /*
  * dts file for Avnet Ultra96 rev1
  *
- * (C) Copyright 2018 - 2020, Xilinx, Inc.
+ * (C) Copyright 2018, Xilinx, Inc.
  *
  * Michal Simek <michal.simek@amd.com>
  */