[][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
1 file changed