When I tested mtw, I noticed that the MAC revision was displayed incorrectly:
ugen0.3: <MediaTek MI WLAN Adapter> at usbus0
mtw0 on uhub0
mtw0: <MediaTek MI WLAN Adapter, class 0/0, rev 2.01/0.00, addr 2> on usbus0
mtw0: version:0x7601
mtw0: loaded firmware ver 00000100 00007640 201302052146____H
mtw0: EEPROM CFG 0x1004
mtw0: MAC/BBP RT7601 (rev 0x0000), RF MT7601 (MIMO 1T1R), address 64:09:80:xx:xx:xx
mtw0: [HT] Enabling 802.11n
After applying the patch:
ugen0.3: <MediaTek MI WLAN Adapter> at usbus0
mtw0 on uhub0
mtw0: <MediaTek MI WLAN Adapter, class 0/0, rev 2.01/0.00, addr 5> on usbus0
mtw0: version:0x7601
mtw0: loaded firmware ver 00000100 00007640 201302052146____H
mtw0: EEPROM CFG 0x1004
mtw0: MAC/BBP RT7601 (rev 0x0500), RF MT7601 (MIMO 1T1R), address 64:09:80:xx:xx:xx
mtw0: [HT] Enabling 802.11n