dt-bindings: powerpc/4xx: move 4xx NDFC and EMAC bindings to subsystem directories

Bindings are supposed to be organized by device class/function. Move a
couple of powerpc 4xx bindings to the correct binding directory.

Cc: linuxppc-dev@lists.ozlabs.org
Signed-off-by: Rob Herring <robh@kernel.org>

diff --git a/Documentation/devicetree/bindings/powerpc/4xx/ndfc.txt b/Documentation/devicetree/bindings/mtd/ibm,ndfc.txt
similarity index 100%
rename from Documentation/devicetree/bindings/powerpc/4xx/ndfc.txt
rename to Documentation/devicetree/bindings/mtd/ibm,ndfc.txt

diff --git a/Documentation/devicetree/bindings/powerpc/4xx/emac.txt b/Documentation/devicetree/bindings/net/ibm,emac.txt
similarity index 100%
rename from Documentation/devicetree/bindings/powerpc/4xx/emac.txt
rename to Documentation/devicetree/bindings/net/ibm,emac.txt