devicetree: bindings: Document Kryo cpu

Document the compatible string for the Kryo family of qcom cpus.

Cc: <devicetree@vger.kernel.org>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Andy Gross <andy.gross@linaro.org>

Documentation/devicetree/bindings/arm/cpus.txt

@@ -178,6 +178,7 @@ nodes to be present and contain the properties described below.
 			    "marvell,sheeva-v5"
 			    "nvidia,tegra132-denver"
 			    "qcom,krait"
+			    "qcom,kryo"
 			    "qcom,scorpion"
 	- enable-method
 		Value type: <stringlist>