dt-bindings: soc: imx: add fsl,aips and fsl,emi compatible strings

Add the fsl,aips and fsl,emi compatible strings for legacy i.MX3 SoCs
(over 15 years old).

Signed-off-by: Frank Li <Frank.Li@nxp.com>
Link: https://patch.msgid.link/20260201011913.2419626-1-Frank.Li@nxp.com
Signed-off-by: Rob Herring (Arm) <robh@kernel.org>

Documentation/devicetree/bindings/bus/fsl,spba-bus.yaml

@@ -19,21 +19,29 @@ description: |
   the SDMA can access.  There are no special clocks for the bus, because
   the SDMA controller itself has its interrupt and clock assignments.
 
+  EMI (External Memory Interface) for legacy i.MX35.
+
 select:
   properties:
     compatible:
       contains:
-        const: fsl,spba-bus
+        enum:
+          - fsl,aips
+          - fsl,emi
+          - fsl,spba-bus
   required:
     - compatible
 
 properties:
   $nodename:
-    pattern: "^spba-bus(@[0-9a-f]+)?$"
+    pattern: "^((spba|emi)-bus|bus)(@[0-9a-f]+)?$"
 
   compatible:
     items:
-      - const: fsl,spba-bus
+      - enum:
+          - fsl,aips
+          - fsl,emi
+          - fsl,spba-bus
       - const: simple-bus
 
   '#address-cells':