dt-bindings: power: reset: atmel,sama5d2-shdwc: add lpm binding

Add microchip,lpm-connection binding which allows to specify the devices
the SHDWC's LPM pin is connected.

Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
[varshini.rajendran@microchip.com: add support in the converted yaml
file during porting from kernel version 6.1 to 6.6]
Signed-off-by: Varshini Rajendran <varshini.rajendran@microchip.com>

Author: varshini-rajendran

Documentation/devicetree/bindings/power/reset/atmel,sama5d2-shdwc.yaml

@@ -48,6 +48,10 @@ properties:
     description: enable real-time timer wake-up
     type: boolean
 
+  microchip,lpm-connection:
+    description: list of phandles to devices which are connected to SHDWC's LPM pin
+    $ref: /schemas/types.yaml#/definitions/phandle
+
 patternProperties:
   "^input@[0-15]$":
     description:
@@ -88,6 +92,17 @@ allOf:
       properties:
         atmel,wakeup-rtt-timer: false
 
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - atmel,sama5d2-shdwc
+              - microchip,sam9x60-shdwc
+    then:
+      properties:
+        microchip,lpm-connection: false
+
 additionalProperties: false
 
 examples: