devicetree: fix name of pinctrl-bindings.txt

Rename:
	pinctrl-binding.txt -> pinctrl-bindings.txt

In order to match the current name of this file.

Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Acked-by: Jonathan Corbet <corbet@lwn.net>
diff --git a/Documentation/devicetree/bindings/serial/microchip,pic32-uart.txt b/Documentation/devicetree/bindings/serial/microchip,pic32-uart.txt
index 7a34345..c8dd440 100644
--- a/Documentation/devicetree/bindings/serial/microchip,pic32-uart.txt
+++ b/Documentation/devicetree/bindings/serial/microchip,pic32-uart.txt
@@ -8,7 +8,7 @@
           See: Documentation/devicetree/bindings/clock/clock-bindings.txt
 - pinctrl-names: A pinctrl state names "default" must be defined.
 - pinctrl-0: Phandle referencing pin configuration of the UART peripheral.
-             See: Documentation/devicetree/bindings/pinctrl/pinctrl-binding.txt
+             See: Documentation/devicetree/bindings/pinctrl/pinctrl-bindings.txt
 
 Optional properties:
 - cts-gpios: CTS pin for UART