mwl8k: fix rf_antenna rx argument for AP

When configuring rx antennas using CMD_RF_ANTENNA, the argument input is
the number of antennas to be enabled. For AP, we support 3 rx antennas
and hence set the field to 3. For tx antennas, value is a bitmap, so 0x7
enables all three.

Signed-off-by: Nishant Sarmukadam <nishants@marvell.com>
Signed-off-by: Pradeep Nemavat <pnemavat@marvell.com>
Signed-off-by: Thomas Pedersen <thomas@cozybit.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/mwl8k.c

@@ -3945,9 +3945,13 @@ static int mwl8k_config(struct ieee80211_hw *hw, u32 changed)
 		if (rc)
 			goto out;
 
-		rc = mwl8k_cmd_rf_antenna(hw, MWL8K_RF_ANTENNA_RX, 0x7);
-		if (!rc)
-			rc = mwl8k_cmd_rf_antenna(hw, MWL8K_RF_ANTENNA_TX, 0x7);
+		rc = mwl8k_cmd_rf_antenna(hw, MWL8K_RF_ANTENNA_RX, 0x3);
+		if (rc)
+			wiphy_warn(hw->wiphy, "failed to set # of RX antennas");
+		rc = mwl8k_cmd_rf_antenna(hw, MWL8K_RF_ANTENNA_TX, 0x7);
+		if (rc)
+			wiphy_warn(hw->wiphy, "failed to set # of TX antennas");
+
 	} else {
 		rc = mwl8k_cmd_rf_tx_power(hw, conf->power_level);
 		if (rc)