Comment # 2 on bug 102926 from Tom St Denis

I've independently bisected it to the same commit on drm-next

commit 0b6b4cbf77c995a34a4ec3d705a636434dadc51a
Author: Rex Zhu <Rex.Zhu@amd.com>
Date:   Thu Sep 14 21:05:18 2017 +0800

    drm/amd/powerplay: Add support for CI asics to hwmgr

    Add support for CI asics (Bonaire, Hawaii) to
    the powerplay hwmgr

    Change-Id: Ia0a31f631dfd717807c16c6c166c994566f644c9
    Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
    Signed-off-by: Rex Zhu <Rex.Zhu@amd.com>