radeon: nuke the entire display controller DRAM BW related code
'tis broken on ps4.
Add support for ps4 encoder to radeon driver
Not terribly happy with how this is hooked up, but it could be way worse.
Work around the SDMA fail by doing a fill instead of a write
A 1-dword write is equivalent to a 1-dword fill, but the latter actually works.
Re-enable all gfx contexts on Liverpool
For some reason, all but 0 and 15 default to off on Liverpool
Enable only 1080p mode for now
There is still some breakage around mode switching, so just force everything to 1080p mode.
Hack: take Linux logo out of initdata.
Our deferred probing runs after late_initcall even though init data is still available. For now, just make it persistent.