[drm-next-4.9-wip] this function not implement on Carizzo

[Johannes Hirte]

With commit fad2af195f1abaada473f4f9e9a554c1e4db768b PowerPlay was
enabled by default for Carizzo, so I assumed this as complete and tested
again. But I still get in dmesg this:

[ powerplay ] this function not implement!
[ powerplay ] min_core_set_clock not set

There are multiple entries on startup and it happens occasional during
runtime. Is PowerPlay on Carizzo still incomplete or is this a special
problem with my system (HP ProBook 645 G2)?

regards,
  Johannes