CRIS: add dt-bindings symlink

Add a dt-bindings symlink to get DT include files, as on other
architectures.  See c58299a ("kbuild: create an "include chroot" for DT
bindings") for the details.

Signed-off-by: Rabin Vincent <rabin@rab.in>
Signed-off-by: Jesper Nilsson <jespern@axis.com>

diff --git a/arch/cris/boot/dts/include/dt-bindings b/arch/cris/boot/dts/include/dt-bindings
new file mode 120000 (symlink)
index 0000000..08c00e4
--- /dev/null
+++ b/arch/cris/boot/dts/include/dt-bindings
@@ -0,0 +1 @@
+../../../../../include/dt-bindings
\ No newline at end of file