drm/nouveau: finalise nvkm namespace switch (no binary change)

The namespace of NVKM is being changed to nvkm_ instead of nouveau_,
which will be used for the DRM part of the driver.  This is being
done in order to make it very clear as to what part of the driver a
given symbol belongs to, and as a minor step towards splitting the
DRM driver out to be able to stand on its own (for virt).

Because there's already a large amount of churn here anyway, this is
as good a time as any to also switch to NVIDIA's device and chipset
naming to ease collaboration with them.

A comparison of objdump disassemblies proves no code changes.

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

drivers/gpu/drm/nouveau/dispnv04/disp.h

@@ -36,7 +36,7 @@ struct nv04_crtc_reg {
 
 	/* PRAMDAC regs */
 	uint32_t nv10_cursync;
-	struct nouveau_pll_vals pllvals;
+	struct nvkm_pll_vals pllvals;
 	uint32_t ramdac_gen_ctrl;
 	uint32_t ramdac_630;
 	uint32_t ramdac_634;
@@ -170,7 +170,7 @@ nouveau_bios_run_init_table(struct drm_device *dev, u16 table,
 			    struct dcb_output *outp, int crtc)
 {
 	struct nouveau_drm *drm = nouveau_drm(dev);
-	struct nouveau_bios *bios = nvxx_bios(&drm->device);
+	struct nvkm_bios *bios = nvxx_bios(&drm->device);
 	struct nvbios_init init = {
 		.subdev = nv_subdev(bios),
 		.bios = bios,