dt-bindings: mfd: Add mp2733 compatible

Add new compatible for mp2733 mfd driver.
Signed-off-by: Saravanan Sekar <sravanhome@gmail.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Link: https://lore.kernel.org/r/20220615145357.2370044-3-sravanhome@gmail.com

Documentation/devicetree/bindings/mfd/mps,mp2629.yaml

@@ -18,7 +18,9 @@ description: |
 
 properties:
   compatible:
-    const: mps,mp2629
+    enum:
+      - mps,mp2629
+      - mps,mp2733
 
   reg:
     maxItems: 1