iwlwifi: mvm: rs: add logs for the wrong antenna case

In case that rate's antenna is wrong at the init stage, it's
very hard to say what went wrong. Add debug data to the already
existing WARN_ON_ONCE.
Signed-off-by: NGregory Greenman <gregory.greenman@intel.com>
Signed-off-by: NLuca Coelho <luciano.coelho@intel.com>

drivers/net/wireless/intel/iwlwifi/iwl-config.h

@@ -131,6 +131,7 @@ enum iwl_led_mode {
 
 /* Antenna presence definitions */
 #define	ANT_NONE	0x0
+#define	ANT_INVALID	0xff
 #define	ANT_A		BIT(0)
 #define	ANT_B		BIT(1)
 #define ANT_C		BIT(2)

drivers/net/wireless/intel/iwlwifi/mvm/rs.c

@@ -2836,7 +2836,11 @@ static void rs_initialize_lq(struct iwl_mvm *mvm,
 	rs_get_initial_rate(mvm, sta, lq_sta, band, rate);
 	rs_init_optimal_rate(mvm, sta, lq_sta);
 
-	WARN_ON_ONCE(rate->ant != ANT_A && rate->ant != ANT_B);
+	WARN_ONCE(rate->ant != ANT_A && rate->ant != ANT_B,
+		  "ant: 0x%x, chains 0x%x, fw tx ant: 0x%x, nvm tx ant: 0x%x\n",
+		  rate->ant, lq_sta->pers.chains, mvm->fw->valid_tx_ant,
+		  mvm->nvm_data ? mvm->nvm_data->valid_tx_ant : ANT_INVALID);
+
 	tbl->column = rs_get_column_from_rate(rate);
 
 	rs_set_expected_tpt_table(lq_sta, tbl);