dt-bindings: lcdif: add lcd panel related property for imx28

Allow lcd panel related property for imx28 and keep the same restriction
for other platform. It is legancy platform and set these property to
deprecated.

Fix below CHECK_DTB warnings:
arch/arm/boot/dts/nxp/mxs/imx28-apx4devkit.dtb: lcdif@80030000 (fsl,imx28-lcdif): 'display', 'display0' do not match any of the regexes: 'pinctrl-[0-9]+'

Signed-off-by: Frank Li <Frank.Li@nxp.com>
Link: https://lore.kernel.org/r/20250529200520.798117-1-Frank.Li@nxp.com
Signed-off-by: Rob Herring (Arm) <robh@kernel.org>

Author: nxpfrankli

Documentation/devicetree/bindings/display/fsl,lcdif.yaml

@@ -71,12 +71,23 @@ properties:
     $ref: /schemas/graph.yaml#/properties/port
     description: The LCDIF output port
 
+  display:
+    $ref: /schemas/types.yaml#/definitions/phandle
+    description: phandle to display panel
+    deprecated: true
+
+  display0:
+    $ref: panel/panel-common.yaml#
+    deprecated: true
+
+  lcd-supply:
+    deprecated: true
+
 required:
   - compatible
   - reg
   - clocks
   - interrupts
-  - port
 
 additionalProperties: false
 
@@ -175,6 +186,12 @@ allOf:
       properties:
         dmas: false
         dma-names: false
+        display: false
+        display0: false
+        lcd-supply: false
+
+      required:
+        - port
 
 examples:
   - |