dt-bindings: move Calxeda bindings to appropriate subsystems

Move the Calxeda memory controller and PHY bindings to appropriate
subsystem directories.

Signed-off-by: Rob Herring <robh@kernel.org>
Cc: Pawel Moll <pawel.moll@arm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Ian Campbell <ijc+devicetree@hellion.org.uk>
Cc: Kumar Gala <galak@codeaurora.org>

diff --git a/Documentation/devicetree/bindings/arm/calxeda/mem-ctrlr.txt b/Documentation/devicetree/bindings/memory-controllers/calxeda-ddr-ctrlr.txt
similarity index 100%
rename from Documentation/devicetree/bindings/arm/calxeda/mem-ctrlr.txt
rename to Documentation/devicetree/bindings/memory-controllers/calxeda-ddr-ctrlr.txt

diff --git a/Documentation/devicetree/bindings/arm/calxeda/combophy.txt b/Documentation/devicetree/bindings/phy/calxeda-combophy.txt
similarity index 100%
rename from Documentation/devicetree/bindings/arm/calxeda/combophy.txt
rename to Documentation/devicetree/bindings/phy/calxeda-combophy.txt