dt-bindings: i2c: pca954x: Add custom properties for MAX7357

Maxim Max7357 has a configuration register to enable additional
features. These features aren't enabled by default & its up to
board designer to enable the same as it may have unexpected side effects.

These should be validated for proper functioning & detection of devices
in secondary bus as sometimes it can cause secondary bus being disabled.

Add booleans for:
- maxim,isolate-stuck-channel
- maxim,send-flush-out-sequence
- maxim,preconnection-wiggle-test-enable

Signed-off-by: Patrick Rudolph <[e-mail]>
Signed-off-by: Naresh Solanki <[e-mail]>
Reviewed-by: Rob Herring <[e-mail]>
Signed-off-by: Andi Shyti <[e-mail]>

Documentation/devicetree/bindings/i2c/i2c-mux-pca954x.yaml

···
     description: A voltage regulator supplying power to the chip. On PCA9846
       the regulator supplies power to VDD2 (core logic) and optionally to VDD1.
 
+  maxim,isolate-stuck-channel:
+    type: boolean
+    description: Allows to use non faulty channels while a stuck channel is
+      isolated from the upstream bus. If not set all channels are isolated from
+      the upstream bus until the fault is cleared.
+
+  maxim,send-flush-out-sequence:
+    type: boolean
+    description: Send a flush-out sequence to stuck auxiliary buses
+      automatically after a stuck channel is being detected.
+
+  maxim,preconnection-wiggle-test-enable:
+    type: boolean
+    description: Send a STOP condition to the auxiliary buses when the switch
+      register activates a channel to detect a stuck high fault. On fault the
+      channel is isolated from the upstream bus.
+
 required:
   - compatible
   - reg
···
         interrupts: false
         "#interrupt-cells": false
         interrupt-controller: false
+
+  - if:
+      not:
+        properties:
+          compatible:
+            contains:
+              enum:
+                - maxim,max7357
+    then:
+      properties:
+        maxim,isolate-stuck-channel: false
+        maxim,send-flush-out-sequence: false
+        maxim,preconnection-wiggle-test-enable: false
 
 unevaluatedProperties: false