of: update ePAPR references to point to Devicetree Specification

The Devicetree Specification has superseded the ePAPR as the
base specification for bindings.  Update files in Documentation
to reference the new document.

First reference to ePAPR in Documentation/devicetree/bindings/arm/cci.txt
is generic, remove it.

Some files are not updated because there is no hypervisor chapter
in the Devicetree Specification:
   Documentation/devicetree/bindings/powerpc/fsl/msi-pic.txt
   Documenation/virtual/kvm/api.txt
   Documenation/virtual/kvm/ppc-pv.txt

Signed-off-by: Frank Rowand <frank.rowand@sony.com>
Signed-off-by: Rob Herring <robh@kernel.org>
diff --git a/Documentation/devicetree/usage-model.txt b/Documentation/devicetree/usage-model.txt
index 2b6b3d3..33a8aaa 100644
--- a/Documentation/devicetree/usage-model.txt
+++ b/Documentation/devicetree/usage-model.txt
@@ -387,7 +387,7 @@
 	of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
 }
 
-"simple-bus" is defined in the ePAPR 1.0 specification as a property
+"simple-bus" is defined in the Devicetree Specification as a property
 meaning a simple memory mapped bus, so the of_platform_populate() code
 could be written to just assume simple-bus compatible nodes will
 always be traversed.  However, we pass it in as an argument so that