HID: THC: Add documentation

Add Documentation/hid/intel-thc-hid.rst file to provide hardware
and software detail for intel THC drivers.

Co-developed-by: Sun Xinpeng <[email protected]>
Signed-off-by: Sun Xinpeng <[email protected]>
Signed-off-by: Even Xu <[email protected]>
Reviewed-by: Srinivas Pandruvada <[email protected]>
Reviewed-by: Bagas Sanjaya <[email protected]>
Reviewed-by: Mark Pearson <[email protected]>
Tested-by: Aaron Ma <[email protected]>
Signed-off-by: Jiri Kosina <[email protected]>

Author: Evenxf

Documentation/hid/index.rst

@@ -18,4 +18,5 @@ Human Interface Devices (HID)
 
    hid-alps
    intel-ish-hid
+   intel-thc-hid
    amd-sfh-hid