dt-bindings: soc: microchip: use absolute path to other schema

Absolute path to other DT schema is preferred over relative one.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Link: https://lore.kernel.org/r/20220726115841.101249-4-krzysztof.kozlowski@linaro.org
diff --git a/Documentation/devicetree/bindings/soc/microchip/atmel,at91rm9200-tcb.yaml b/Documentation/devicetree/bindings/soc/microchip/atmel,at91rm9200-tcb.yaml
index 2f8cf61..33748a0 100644
--- a/Documentation/devicetree/bindings/soc/microchip/atmel,at91rm9200-tcb.yaml
+++ b/Documentation/devicetree/bindings/soc/microchip/atmel,at91rm9200-tcb.yaml
@@ -75,7 +75,7 @@
 
   "^pwm@[0-2]$":
     description: The timer block channels that are used as PWMs.
-    $ref: ../../pwm/pwm.yaml#
+    $ref: /schemas/pwm/pwm.yaml#
     type: object
     properties:
       compatible: