[][MAC80211][app][atenl: sync mt7915 antenna_mask]

[Description]
Change antenna_mask of mt7915 to sync with mt7916 and mt7986.

[Release-log]
N/A

Change-Id: Iea6ef8cde4f162b56fa3e6184b201536498c26ba
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/6879530
diff --git a/feed/atenl/src/nl.c b/feed/atenl/src/nl.c
index b919356..7cbda0f 100644
--- a/feed/atenl/src/nl.c
+++ b/feed/atenl/src/nl.c
@@ -125,11 +125,8 @@
 {
 	if (!tx_antenna)
 		return;
-	if (is_mt7915(an))
-		nla_put_u8(msg, MT76_TM_ATTR_TX_ANTENNA,
-			   tx_antenna << (2 * an->cur_band));
-	else if (is_mt7916(an) || is_mt7986(an))
-		nla_put_u8(msg, MT76_TM_ATTR_TX_ANTENNA, tx_antenna);
+
+	nla_put_u8(msg, MT76_TM_ATTR_TX_ANTENNA, tx_antenna);
 }
 
 static int