dts/bindings: Update soc-nv-flash to use base.yaml

Now that we sort the instance id's we can update soc-nv-flash to use
base.yaml.

Signed-off-by: Kumar Gala <kumar.gala@linaro.org>

dts/bindings/mtd/soc-nv-flash.yaml

@@ -5,19 +5,15 @@ version: 0.1
 description: >
     This binding gives a base FLASH description
 
+inherits:
+    !include base.yaml
+
 properties:
     compatible:
-      type: string
-      category: required
-      description: compatible strings
       constraint: "soc-nv-flash"
-      generation: define
 
     label:
-      type: string
       category: optional
-      description: Human readable string describing the device (used by Zephyr for API name)
-      generation: define
 
     erase-block-size:
      type: int