fix(dt-bindings): fix static checks

This patch fixes static checks errors reported for missing copyright in
`include/dt-bindings/interrupt-controller/arm-gic.h` and the include
order of header files in `.dts` and `.dtsi` files.

Change-Id: I2baaf2719fd2c84cbcc08a8f0c4440a17a9f24f6
Signed-off-by: Alexei Fedorov <Alexei.Fedorov@arm.com>
Signed-off-by: Chris Kay <chris.kay@arm.com>
diff --git a/include/dt-bindings/interrupt-controller/arm-gic.h b/include/dt-bindings/interrupt-controller/arm-gic.h
index a3923f0..fbe07da 100644
--- a/include/dt-bindings/interrupt-controller/arm-gic.h
+++ b/include/dt-bindings/interrupt-controller/arm-gic.h
@@ -1,6 +1,8 @@
-/* SPDX-License-Identifier: MIT */
-
 /*
+ * Copyright (c) 2019-2021, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: MIT
+ *
  * This header provides constants for the ARM GIC.
  */