linux-wandboard

drm/nouveau/gpuobj: remove flags for vm-mappings

Having GPUOBJ and VM intertwined like this makes it *really* hard to
continue porting to the new driver architecture, split it out in
favour of requiring explit maps be the caller.

It's more flexible and obvious this way anyway...

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>