This INF from the bootcamp 4.0.4033 version
Code:
[IDT.NTamd64]
%ST.DeviceDesc%=STHDA,HDAUDIO\FUNC_01&VEN_8384&DEV_7680&SUBSYS_106B0800 ; Board1.ini
%ST.DeviceDesc%=STHDA,HDAUDIO\FUNC_01&VEN_8384&DEV_7680&SUBSYS_106B0600 ; Board2.ini
%ST.DeviceDesc%=STHDA,HDAUDIO\FUNC_01&VEN_8384&DEV_7680&SUBSYS_106B0700 ; Board2.ini
%ST.DeviceDesc%=STHDA,HDAUDIO\FUNC_01&VEN_8384&DEV_7680&SUBSYS_106B0E00 ; Board3.ini
%ST.DeviceDesc%=STHDA,HDAUDIO\FUNC_01&VEN_8384&DEV_7680&SUBSYS_106B0F00 ; Board3.ini
%ST.DeviceDesc%=STHDA,HDAUDIO\FUNC_01&VEN_8384&DEV_7680&SUBSYS_106B1600 ; Board3.ini
%ST.DeviceDesc%=STHDA,HDAUDIO\FUNC_01&VEN_8384&DEV_7680&SUBSYS_106B1700 ; Board3.ini
%ST.DeviceDesc%=STHDA,HDAUDIO\FUNC_01&VEN_8384&DEV_7680&SUBSYS_106B0200 ; Board3.ini
%ST.DeviceDesc%=STHDA,HDAUDIO\FUNC_01&VEN_8384&DEV_7680&SUBSYS_106B1E00 ; Board3.ini
%ST.DeviceDesc%=STHDA,HDAUDIO\FUNC_01&VEN_8384&DEV_7680&SUBSYS_106B0400 ; Board4.ini
%ST.DeviceDesc%=STHDA,HDAUDIO\FUNC_01&VEN_8384&DEV_7680&SUBSYS_106B1A00 ; Board4.ini
%ST.DeviceDesc%=STHDA,HDAUDIO\FUNC_01&VEN_8384&DEV_7680&SUBSYS_106B0A00 ; Board5.ini
%ST.DeviceDesc%=STHDA,HDAUDIO\FUNC_01&VEN_8384&DEV_7680&SUBSYS_106B2200 ; Board5.ini
%ST.DeviceDesc%=SIGNONLY,HDAUDIO\FUNC_01&VEN_FFFF&DEV_FFFF
So it looks like it should work for you as well.
However I've recently done a clean install on a new SSD and can't get it to install. It complains "device object is missing" and I'm stuck with Device manager looking OK but no sound and the red light on again.
It installs (and works) perfectly well on a system upgraded from the first Windows 10 insider preview (if I put the old disk back in) so some pre-req is missing on a 1607 clean install but I don't know what.
If I figure it out I'll update this.