qcacmn: Clear legacy channel ID usage

1) Remove the definition of plm_ch_list from
   struct plm_req_params and add plm_ch_freq_list
   into the same struct given frequencies will be
   used directly before passing WMI command to
   firmware.

2) Remove redundant channel frequency list from the
   following API functions' parameters:

   send_plm_start_cmd
   wmi_unified_plm_start_cmd
   send_plm_start_cmd_tlv

Change-Id: I982412076b422356037d9bbfa2077affd1056189
CRs-Fixed: 2560085

wmi/inc/wmi_unified_priv.h

@@ -617,8 +617,7 @@ QDF_STATUS (*send_plm_stop_cmd)(wmi_unified_t wmi_handle,
 		 const struct plm_req_params *plm);
 
 QDF_STATUS (*send_plm_start_cmd)(wmi_unified_t wmi_handle,
-		  const struct plm_req_params *plm,
-		  uint32_t *gchannel_list);
+				 const struct plm_req_params *plm);
 #endif /* FEATURE_WLAN_ESE */
 
 #ifdef WLAN_FEATURE_ROAM_OFFLOAD