Update to 20200629111339 version to aligh SDK. Mainly fix DFS false alarm.

Signed-off-by: Shayne Chen <shayne.chen@mediatek.com>
Signed-off-by: Ryder Lee <ryder.lee@mediatek.com>
Signed-off-by: Josh Boyer <jwboyer@kernel.org>

WHENCE

@@ -4645,7 +4645,7 @@ Licence: Redistributable. See LICENCE.mediatek for details.
 Driver: mt7615e - MediaTek MT7615e Wireless MACs
 
 File: mediatek/mt7615_n9.bin
-Version: 20200131
+Version: 20200629
 File: mediatek/mt7615_cr4.bin
 Version: 20190114
 File: mediatek/mt7615_rom_patch.bin