crypto: caam - Added property fsl,sec-era in SEC4.0 device tree binding.

This new property defines the era of the particular SEC version.
The compatible property in device tree "crypto" node has been updated
not to contain SEC era numbers.

Signed-off-by: Vakul Garg <[e-mail]>
Signed-off-by: Herbert Xu <[e-mail]>

Documentation/devicetree/bindings/crypto/fsl-sec4.txt

···
    - compatible
       Usage: required
       Value type: <string>
-      Definition: Must include "fsl,sec-v4.0". Also includes SEC
-           ERA versions (optional) with which the device is compatible.
+      Definition: Must include "fsl,sec-v4.0"
+
+   - fsl,sec-era
+      Usage: optional
+      Value type: <u32>
+      Definition: A standard property. Define the 'ERA' of the SEC
+          device.
 
    - #address-cells
        Usage: required
···
 
 EXAMPLE
 	crypto@300000 {
-		compatible = "fsl,sec-v4.0", "fsl,sec-era-v2.0";
+		compatible = "fsl,sec-v4.0";
+		fsl,sec-era = <2>;
 		#address-cells = <1>;
 		#size-cells = <1>;
 		reg = <0x300000 0x10000>;