commit ae5b80d2 upstream.

Looks like some RV6xx have problems with that.

bug:
https://bugs.freedesktop.org/show_bug.cgi?id=97099Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>