Documentation: DT: Fix a typo in the filename "lantiq,<chip>-pinumx.txt"

To fix it, use the chance to rename according the compatible string,
which is "lantiq,pinctrl-falcon" and  "lantiq,pinctrl-xway"

Signed-off-by: Thomas Langer <thomas.langer@lantiq.com>
Cc: John Crispin <blogic@openwrt.org>
Signed-off-by: Rob Herring <robh@kernel.org>

diff --git a/Documentation/devicetree/bindings/pinctrl/lantiq,falcon-pinumx.txt b/Documentation/devicetree/bindings/pinctrl/lantiq,pinctrl-falcon.txt
similarity index 100%
rename from Documentation/devicetree/bindings/pinctrl/lantiq,falcon-pinumx.txt
rename to Documentation/devicetree/bindings/pinctrl/lantiq,pinctrl-falcon.txt

diff --git a/Documentation/devicetree/bindings/pinctrl/lantiq,xway-pinumx.txt b/Documentation/devicetree/bindings/pinctrl/lantiq,pinctrl-xway.txt
similarity index 100%
rename from Documentation/devicetree/bindings/pinctrl/lantiq,xway-pinumx.txt
rename to Documentation/devicetree/bindings/pinctrl/lantiq,pinctrl-xway.txt