drivers/gpu/drm/nouveau/nvif/Kbuild

nvif-y := nvif/object.o
nvif-y += nvif/client.o
nvif-y += nvif/device.o
nvif-y += nvif/driver.o
nvif-y += nvif/mem.o
nvif-y += nvif/mmu.o
nvif-y += nvif/notify.o
nvif-y += nvif/vmm.o