IT8786E is mostly compatible with IT8771 / IT8772.
Parameters determined by testing various combinations.
Reviewed-by: NJean Delvare <jdelvare@suse.de>
Signed-off-by: NThomas Lorblanches <zlika_ese@hotmail.com>
[Guenter Roeck: merged from github, addressed review comments]
Signed-off-by: NGuenter Roeck <linux@roeck-us.net>