ARM: dts: add arm/arm64 include symlinks

Allow including of dtsi files in an architecture-independent manner.
Some dtsi files may be shared between architectures and one suggestion
was to have symlinks and let these includes get accessed via a
    #include <arm64/foo.dtsi>
So add the necessary symlinks for arm32.

Suggested-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Olof Johansson <olof@lixom.net>

diff --git a/arch/arm/boot/dts/include/arm b/arch/arm/boot/dts/include/arm
new file mode 120000 (symlink)
index 0000000..a96aa0e
--- /dev/null
+++ b/arch/arm/boot/dts/include/arm
@@ -0,0 +1 @@
+..
\ No newline at end of file

diff --git a/arch/arm/boot/dts/include/arm64 b/arch/arm/boot/dts/include/arm64
new file mode 120000 (symlink)
index 0000000..074a835
--- /dev/null
+++ b/arch/arm/boot/dts/include/arm64
@@ -0,0 +1 @@
+../../../../arm64/boot/dts
\ No newline at end of file