dt-bindings: mtd: ti,elm: Add support for AM64 ELM

TI's AM64 SoC has the Error Locator Module. Add compatible and
related properties to support ELM on AM64 SoC.
Signed-off-by: Roger Quadros <rogerq@kernel.org>
Reviewed-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20220326080726.30372-3-rogerq@kernel.org

Documentation/devicetree/bindings/mtd/ti,elm.yaml

@@ -18,6 +18,7 @@ properties:
   compatible:
     enum:
       - ti,am3352-elm
+      - ti,am64-elm
 
   reg:
     maxItems: 1
@@ -25,6 +26,17 @@ properties:
   interrupts:
     maxItems: 1
 
+  clocks:
+    maxItems: 1
+    description: Functional clock.
+
+  clock-names:
+    items:
+      - const: fck
+
+  power-domains:
+    maxItems: 1
+
   ti,hwmods:
     description:
       Name of the HWMOD associated with ELM. This is for legacy
@@ -37,6 +49,18 @@ required:
   - reg
   - interrupts
 
+allOf:
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: ti,am64-elm
+    then:
+      required:
+        - clocks
+        - clock-names
+        - power-domains
+
 additionalProperties: false
 
 examples: