qcacmn: Add check for regulatory channel list

Regulatory module calls registered callbacks when channel list is changed.
But channel list may not have been received when path for callbacks is
reached. So keep a track if channel list has been received. If not, do
not call the callbacks.

Change-Id: I2e1a6e442b0d5c79e786806e00b1c50c9491dae0
CRs-Fixed: 2563759

umac/regulatory/dispatcher/inc/wlan_reg_services_api.h

@@ -632,14 +632,6 @@ QDF_STATUS regulatory_psoc_open(struct wlan_objmgr_psoc *psoc);
  */
 QDF_STATUS regulatory_psoc_close(struct wlan_objmgr_psoc *psoc);
 
-/**
- * regulatory_pdev_open() - Open regulatory component
- * @pdev: Pointer to pdev structure.
- *
- * Return: Success or Failure
- */
-QDF_STATUS regulatory_pdev_open(struct wlan_objmgr_pdev *pdev);
-
 /**
  * regulatory_pdev_close() - Close regulatory component
  * @pdev: Pointer to pdev structure.