docs: add SPDX tags to new index files

All those new files I added are under GPL v2.0 license.

Add the corresponding SPDX headers to them.

Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
diff --git a/Documentation/arm/index.rst b/Documentation/arm/index.rst
index 9c2f781..5fc072d 100644
--- a/Documentation/arm/index.rst
+++ b/Documentation/arm/index.rst
@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: GPL-2.0
+
 ================
 ARM Architecture
 ================
diff --git a/Documentation/arm/nwfpe/index.rst b/Documentation/arm/nwfpe/index.rst
index 21fa8ce..3c4d2f9 100644
--- a/Documentation/arm/nwfpe/index.rst
+++ b/Documentation/arm/nwfpe/index.rst
@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: GPL-2.0
+
 ===================================
 NetWinder's floating point emulator
 ===================================
diff --git a/Documentation/arm/omap/index.rst b/Documentation/arm/omap/index.rst
index f1e9c11..8b365b2 100644
--- a/Documentation/arm/omap/index.rst
+++ b/Documentation/arm/omap/index.rst
@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: GPL-2.0
+
 =======
 TI OMAP
 =======
diff --git a/Documentation/arm/sa1100/index.rst b/Documentation/arm/sa1100/index.rst
index fb2385b..68c2a28 100644
--- a/Documentation/arm/sa1100/index.rst
+++ b/Documentation/arm/sa1100/index.rst
@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: GPL-2.0
+
 ====================
 Intel StrongARM 1100
 ====================
diff --git a/Documentation/arm/samsung-s3c24xx/index.rst b/Documentation/arm/samsung-s3c24xx/index.rst
index 6c7b241..5b8a7f9 100644
--- a/Documentation/arm/samsung-s3c24xx/index.rst
+++ b/Documentation/arm/samsung-s3c24xx/index.rst
@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: GPL-2.0
+
 ==========================
 Samsung S3C24XX SoC Family
 ==========================
diff --git a/Documentation/arm/samsung/index.rst b/Documentation/arm/samsung/index.rst
index f54d957..8142cce 100644
--- a/Documentation/arm/samsung/index.rst
+++ b/Documentation/arm/samsung/index.rst
@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: GPL-2.0
+
 ===========
 Samsung SoC
 ===========