media: dt-bindings: media: rcar_vin: Use status "okay"

According to the Devicetree Specification, "ok" is not a valid status.

Fixes: 47c71bd6 ("[media] rcar_vin: add devicetree support")
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

Documentation/devicetree/bindings/media/rcar_vin.txt

@@ -56,7 +56,7 @@ Board setup example (vin1 composite video input)
 ------------------------------------------------
 
 &i2c2   {
-        status = "ok";
+        status = "okay";
         pinctrl-0 = <&i2c2_pins>;
         pinctrl-names = "default";
 
@@ -79,7 +79,7 @@ Board setup example (vin1 composite video input)
         pinctrl-0 = <&vin1_pins>;
         pinctrl-names = "default";
 
-        status = "ok";
+        status = "okay";
 
         port {
                 #address-cells = <1>;