iwlwifi: dvm: lib: Demote non-compliant kernel-doc headers

Neither of these headers attempt to document any function parameters.

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

 drivers/net/wireless/intel/iwlwifi/dvm/lib.c:121: warning: Function parameter or member 'priv' not described in 'iwlagn_txfifo_flush'
 drivers/net/wireless/intel/iwlwifi/dvm/lib.c:121: warning: Function parameter or member 'scd_q_msk' not described in 'iwlagn_txfifo_flush'
 drivers/net/wireless/intel/iwlwifi/dvm/lib.c:779: warning: Function parameter or member 'priv' not described in 'iwlagn_set_rxon_chain'
 drivers/net/wireless/intel/iwlwifi/dvm/lib.c:779: warning: Function parameter or member 'ctx' not described in 'iwlagn_set_rxon_chain'

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: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20200910065431.657636-5-lee.jones@linaro.org

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

@@ -110,7 +110,7 @@ int iwlagn_manage_ibss_station(struct iwl_priv *priv,
 				  vif->bss_conf.bssid);
 }
 
-/**
+/*
  * iwlagn_txfifo_flush: send REPLY_TXFIFO_FLUSH command to uCode
  *
  * pre-requirements:
@@ -769,7 +769,7 @@ static u8 iwl_count_chain_bitmap(u32 chain_bitmap)
 	return res;
 }
 
-/**
+/*
  * iwlagn_set_rxon_chain - Set up Rx chain usage in "staging" RXON image
  *
  * Selects how many and which Rx receivers/antennas/chains to use.