arm64: zynqmp: Add missing year in Kria dts files

DT files have been added this year but forgot to update it that's why do it
in separate patch now.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
diff --git a/arch/arm/dts/zynqmp-sck-kv-g-revA.dts b/arch/arm/dts/zynqmp-sck-kv-g-revA.dts
index cca009e..59d5751 100644
--- a/arch/arm/dts/zynqmp-sck-kv-g-revA.dts
+++ b/arch/arm/dts/zynqmp-sck-kv-g-revA.dts
@@ -2,7 +2,7 @@
 /*
  * dts file for KV260 revA Carrier Card
  *
- * (C) Copyright 2020, Xilinx, Inc.
+ * (C) Copyright 2020 - 2021, Xilinx, Inc.
  *
  * SD level shifter:
  * "A" – A01 board un-modified (NXP)