dt-bindings: crypto: fsl,sec-v4.0: add second register space for rtic

Add two description for register space of rtic. There are two register
space, one is for control and status, the other optional space is
recoverable error indication register space.

Fix below CHECK_DTBS error:
arch/arm64/boot/dts/freescale/fsl-ls1012a-frdm.dtb: crypto@1700000: rtic@60000:reg: [[393216, 256], [396800, 24]] is too long
        from schema $id: http://devicetree.org/schemas/crypto/fsl,sec-v4.0.yaml#Signed-off-by: Frank Li <Frank.Li@nxp.com>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

Documentation/devicetree/bindings/crypto/fsl,sec-v4.0.yaml

@@ -137,7 +137,10 @@ patternProperties:
           - const: fsl,sec-v4.0-rtic
 
       reg:
-        maxItems: 1
+        items:
+          - description: RTIC control and status register space.
+          - description: RTIC recoverable error indication register space.
+        minItems: 1
 
       ranges:
         maxItems: 1