dt-bindings: sram: Merge Rockchip SRAM bindings into generic

The Rockchip SRAM bindings list only compatible so integrate them into
generic SRAM bindings schema.
Signed-off-by: NKrzysztof Kozlowski <krzk@kernel.org>
Acked-by: NHeiko Stuebner <heiko@sntech.de>
Signed-off-by: NRob Herring <robh@kernel.org>

Documentation/devicetree/bindings/sram/rockchip-smp-sram.txt

-Rockchip SRAM for smp bringup:
-------------------------------
-
-Rockchip's smp-capable SoCs use the first part of the sram for the bringup
-of the cores. Once the core gets powered up it executes the code that is
-residing at the very beginning of the sram.
-
-Therefore a reserved section sub-node has to be added to the mmio-sram
-declaration.
-
-Required sub-node properties:
-- compatible : should be "rockchip,rk3066-smp-sram"
-
-The rest of the properties should follow the generic mmio-sram discription
-found in Documentation/devicetree/bindings/sram/sram.txt
-
-Example:
-
-	sram: sram@10080000 {
-		compatible = "mmio-sram";
-		reg = <0x10080000 0x10000>;
-		#address-cells = <1>;
-		#size-cells = <1>;
-		ranges;
-
-		smp-sram@10080000 {
-			compatible = "rockchip,rk3066-smp-sram";
-			reg = <0x10080000 0x50>;
-		};
-	};

Documentation/devicetree/bindings/sram/sram.yaml

@@ -68,6 +68,7 @@ patternProperties:
           - amlogic,meson8-smp-sram
           - amlogic,meson8b-smp-sram
           - renesas,smp-sram
+          - rockchip,rk3066-smp-sram
           - samsung,exynos4210-sysram
           - samsung,exynos4210-sysram-ns
 
@@ -200,3 +201,17 @@ examples:
             reg = <0 0x10>;
         };
     };
+
+  - |
+    sram@10080000 {
+        compatible = "mmio-sram";
+        reg = <0x10080000 0x10000>;
+        #address-cells = <1>;
+        #size-cells = <1>;
+        ranges;
+
+        smp-sram@10080000 {
+            compatible = "rockchip,rk3066-smp-sram";
+            reg = <0x10080000 0x50>;
+        };
+    };