dt-bindings: net: move FMan binding

Besides the PPC SoCs, the QorIQ DPAA FMan is also present on ARM SoCs,
moving the device tree binding document into the bindings/net folder.

Signed-off-by: Madalin Bucur <madalin.bucur@nxp.com>
Signed-off-by: Rob Herring <robh@kernel.org>

diff --git a/Documentation/devicetree/bindings/powerpc/fsl/fman.txt b/Documentation/devicetree/bindings/net/fsl-fman.txt
similarity index 100%
rename from Documentation/devicetree/bindings/powerpc/fsl/fman.txt
rename to Documentation/devicetree/bindings/net/fsl-fman.txt