[][MAC80211][WiFi6][mt76][Add dummy HW offload of IEEE 802.11 fragmentation]

[Description]
Add dummy HW offload of IEEE 802.11 fragmentation.
Specifically, CONNAC2 series do not support encryption for fragmented Tx frames.
Therefore, add dummy function mt7915_set_frag_threshold() to prevent SW IEEE 802.11 fragmentation.

[Release-log]
N/A

Change-Id: I2df221064e761f1c93673754e095f998410cdb91
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/8950161
1 file changed