dt-bindings: net: wireless: ath11k: add ieee80211-freq-limit property

This is an existing optional property that ieee80211.yaml/cfg80211
provides. It's useful to further restrict supported frequencies
for a specified device through device-tree.

Acked-by: Conor Dooley <conor.dooley@microchip.com>
Signed-off-by: Christian Lamparter <chunkeey@gmail.com>
Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com>
Link: https://msgid.link/fc606d2550d047a53b4289235dd3c0fe23d5daac.1686486468.git.chunkeey@gmail.com

Documentation/devicetree/bindings/net/wireless/qcom,ath11k.yaml

@@ -59,6 +59,8 @@ properties:
     minItems: 1
     maxItems: 2
 
+  ieee80211-freq-limit: true
+
   wifi-firmware:
     type: object
     description: |
@@ -88,6 +90,7 @@ required:
 additionalProperties: false
 
 allOf:
+  - $ref: ieee80211.yaml#
   - if:
       properties:
         compatible: