drm/nouveau/mmu: switch to instanced constructor

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Reviewed-by: Lyude Paul <lyude@redhat.com>

drm/nouveau/mmu: remove old vmm frontend

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

drm/nouveau/mmu: define user interfaces to mmu

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

drm/nouveau/mmu/nv50,g84: type-based vram allocation and bar mapping

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

drm/nouveau/mmu: build up information on available memory types

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

drm/nouveau/mmu: remove support for old backends

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

drm/nouveau/mmu/nv50,g84: implement new vmm backend

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

drm/nouveau/mmu: remove old vm creation hooks

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

drm/nouveau/mmu/nv50,g84: implement vmm on top of new base

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

drm/nouveau/mmu/g84: fork from nv50

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