iwlwifi: dvm: Demote a couple of nonconformant kernel-doc headers

Fixes the following W=1 kernel build warning(s):

 drivers/net/wireless/intel/iwlwifi/dvm/rx.c:145: warning: Function parameter or member 'priv' not described in 'iwlagn_good_plcp_health'
 drivers/net/wireless/intel/iwlwifi/dvm/rx.c:145: warning: Function parameter or member 'cur_ofdm' not described in 'iwlagn_good_plcp_health'
 drivers/net/wireless/intel/iwlwifi/dvm/rx.c:145: warning: Function parameter or member 'cur_ofdm_ht' not described in 'iwlagn_good_plcp_health'
 drivers/net/wireless/intel/iwlwifi/dvm/rx.c:145: warning: Function parameter or member 'msecs' not described in 'iwlagn_good_plcp_health'
 drivers/net/wireless/intel/iwlwifi/dvm/rx.c:939: warning: Function parameter or member 'priv' not described in 'iwl_setup_rx_handlers'

Cc: Johannes Berg <johannes.berg@intel.com>
Cc: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Cc: Luca Coelho <luciano.coelho@intel.com>
Cc: Intel Linux Wireless <linuxwifi@intel.com>
Cc: Kalle Valo <kvalo@codeaurora.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: linux-wireless@vger.kernel.org
Cc: netdev@vger.kernel.org
Signed-off-by: NLee Jones <lee.jones@linaro.org>
Signed-off-by: NKalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20200910065431.657636-10-lee.jones@linaro.org

drivers/net/wireless/intel/iwlwifi/dvm/rx.c

@@ -132,7 +132,7 @@ static void iwlagn_rx_beacon_notif(struct iwl_priv *priv,
 	priv->ibss_manager = le32_to_cpu(beacon->ibss_mgr_status);
 }
 
-/**
+/*
  * iwl_good_plcp_health - checks for plcp error.
  *
  * When the plcp error is exceeding the thresholds, reset the radio
@@ -929,7 +929,7 @@ static void iwlagn_rx_noa_notification(struct iwl_priv *priv,
 		kfree_rcu(old_data, rcu_head);
 }
 
-/**
+/*
  * iwl_setup_rx_handlers - Initialize Rx handler callbacks
  *
  * Setup the RX handlers for each of the reply types sent from the uCode