ARM: dts: Freescale: re-license device tree files under GPLv2+/X11

The current GPL only licensing on the device trees makes it very
impractical for other software components licensed under another
license.

To make it easier to reuse them, re-license the the device trees for
Freescale (now NXP) SoCs and boards under GPLv2+/X11 dual license.

Same trend is followed in linux.

Cc: Priyanka Jain <priyanka.jain@nxp.com>
Cc: Mingkai Hu <mingkai.hu@nxp.com>
Cc: York Sun <york.sun@nxp.com>
Signed-off-by: Pankaj Bansal <pankaj.bansal@nxp.com>
Reviewed-by: York Sun <york.sun@nxp.com>
diff --git a/arch/arm/dts/fsl-ls2080a-rdb.dts b/arch/arm/dts/fsl-ls2080a-rdb.dts
index 1a1813b..04b1a71 100644
--- a/arch/arm/dts/fsl-ls2080a-rdb.dts
+++ b/arch/arm/dts/fsl-ls2080a-rdb.dts
@@ -3,7 +3,7 @@
  *
  * Copyright 2013-2015 Freescale Semiconductor, Inc.
  *
- * SPDX-License-Identifier:	GPL-2.0+
+ * SPDX-License-Identifier:	GPL-2.0+	X11
  */
 
 /dts-v1/;