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>

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)

arch/arm/dts/zynqmp-sck-kv-g-revB.dts

@@ -2,7 +2,7 @@
 /*
  * dts file for KV260 revA Carrier Card
  *
- * (C) Copyright 2020, Xilinx, Inc.
+ * (C) Copyright 2020 - 2021, Xilinx, Inc.
  *
  * Michal Simek <michal.simek@xilinx.com>
  */

arch/arm/dts/zynqmp-sm-k26-revA-u-boot.dtsi

@@ -2,7 +2,7 @@
 /*
  * dts file for Xilinx ZynqMP K26/KV260 SD wiring
  *
- * (C) Copyright 2020, Xilinx, Inc.
+ * (C) Copyright 2020 - 2021, Xilinx, Inc.
  *
  * Michal Simek <michal.simek@xilinx.com>
  */

arch/arm/dts/zynqmp-sm-k26-revA.dts

@@ -2,7 +2,7 @@
 /*
  * dts file for Xilinx ZynqMP SM-K26 rev1/B/A
  *
- * (C) Copyright 2020, Xilinx, Inc.
+ * (C) Copyright 2020 - 2021, Xilinx, Inc.
  *
  * Michal Simek <michal.simek@xilinx.com>
  */

arch/arm/dts/zynqmp-smk-k26-revA-u-boot.dtsi

@@ -2,7 +2,7 @@
 /*
  * dts file for Xilinx ZynqMP Z2-VSOM
  *
- * (C) Copyright 2020, Xilinx, Inc.
+ * (C) Copyright 2020 - 2021, Xilinx, Inc.
  *
  * Michal Simek <michal.simek@xilinx.com>
  */

arch/arm/dts/zynqmp-smk-k26-revA.dts

@@ -2,7 +2,7 @@
 /*
  * dts file for Xilinx ZynqMP SMK-K26 rev1/B/A
  *
- * (C) Copyright 2020, Xilinx, Inc.
+ * (C) Copyright 2020 - 2021, Xilinx, Inc.
  *
  * Michal Simek <michal.simek@xilinx.com>
  */