dt-bindings: add documentation for rk3188 clock and reset unit

This add bindings documentation for the clock and reset unit found on
rk3188 and rk3066 SoCs from Rockchip.

Also deprecate the old gate clock binding, as these shouldn't be used
in the future.

Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Acked-By: Max Schwarz <max.schwarz@online.de>
Tested-By: Max Schwarz <max.schwarz@online.de>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
diff --git a/Documentation/devicetree/bindings/clock/rockchip.txt b/Documentation/devicetree/bindings/clock/rockchip.txt
index a891c82..22f6769 100644
--- a/Documentation/devicetree/bindings/clock/rockchip.txt
+++ b/Documentation/devicetree/bindings/clock/rockchip.txt
@@ -6,6 +6,9 @@
 
 == Gate clocks ==
 
+These bindings are deprecated!
+Please use the soc specific CRU bindings instead.
+
 The gate registers form a continuos block which makes the dt node
 structure a matter of taste, as either all gates can be put into
 one gate clock spanning all registers or they can be divided into