[media] dt-bindings: media/s5p-cec.txt, media/stih-cec.txt: refer to cec.txt

Now that there is a cec.txt with common CEC bindings, update the two
driver-specific bindings to refer to cec.txt.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Acked-by: Benjamin Gaignard <benjamin.gaignard@linaro.org>
Acked-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

Documentation/devicetree/bindings/media/s5p-cec.txt

@@ -15,13 +15,11 @@ Required properties:
   - clock-names : from common clock binding: must contain "hdmicec",
 		  corresponding to entry in the clocks property.
   - samsung,syscon-phandle - phandle to the PMU system controller
-  - hdmi-phandle - phandle to the HDMI controller
+  - hdmi-phandle - phandle to the HDMI controller, see also cec.txt.
 
 Optional:
   - needs-hpd : if present the CEC support is only available when the HPD
-    is high. Some boards only let the CEC pin through if the HPD is high, for
-    example if there is a level converter that uses the HPD to power up
-    or down.
+		is high. See cec.txt for more details.
 
 Example:
 

Documentation/devicetree/bindings/media/stih-cec.txt

@@ -9,7 +9,7 @@ Required properties:
  - pinctrl-names: Contains only one value - "default"
  - pinctrl-0: Specifies the pin control groups used for CEC hardware.
  - resets: Reference to a reset controller
- - hdmi-phandle: Phandle to the HDMI controller
+ - hdmi-phandle: Phandle to the HDMI controller, see also cec.txt.
 
 Example for STIH407: