Comment # 4 on bug 107595 from Przemek

I apologize,
it seems that I forget to make last step during yesterday bisection.

Here is what git bisect produces:

561a5c83eadde747253924be2f7be9070841b7c0 is the first bad commit
commit 561a5c83eadde747253924be2f7be9070841b7c0
Author: Rex Zhu <Rex.Zhu@amd.com>
Date:   Tue Jun 5 13:06:11 2018 +0800

    drm/amd/pp: Unify powergate_uvd/vce/mmhub to set_powergating_by_smu

    Some HW ip blocks need call SMU to enter/leave power gate state.
    So export common set_powergating_by_smu interface.

    1. keep consistent with set_clockgating_by_smu
    2. scales easily to powergate other ip(gfx) if necessary

    Reviewed-by: Evan Quan <evan.quan@amd.com>
    Signed-off-by: Rex Zhu <Rex.Zhu@amd.com>

:040000 040000 7b10ae9bb22235cbd05fef91e7ba5277a413759d
716e5604c837785fd0aa6896f72eac7e36513a2f M      drivers

Thanks,
Przemek.