Documentation: dt-bindings: Fix interrupt documentation file path

Fix the incorrect interrupt documentation file path in binding docs.

Signed-off-by: Andrew F. Davis <afd@ti.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
diff --git a/Documentation/devicetree/bindings/sound/wm8994.txt b/Documentation/devicetree/bindings/sound/wm8994.txt
index e045e90..68c4e8d 100644
--- a/Documentation/devicetree/bindings/sound/wm8994.txt
+++ b/Documentation/devicetree/bindings/sound/wm8994.txt
@@ -30,7 +30,7 @@
   - #interrupt-cells: the number of cells to describe an IRQ, this should be 2.
     The first cell is the IRQ number.
     The second cell is the flags, encoded as the trigger masks from
-    Documentation/devicetree/bindings/interrupts.txt
+    Documentation/devicetree/bindings/interrupt-controller/interrupts.txt
 
   - clocks : A list of up to two phandle and clock specifier pairs
   - clock-names : A list of clock names sorted in the same order as clocks.