drm/nouveau/bios/gv100: initial support

No real surprises here so far.
Signed-off-by: NBen Skeggs <bskeggs@redhat.com>

drivers/gpu/drm/nouveau/nvkm/engine/device/base.c

@@ -2397,6 +2397,7 @@ nv13b_chipset = {
 static const struct nvkm_device_chip
 nv140_chipset = {
 	.name = "GV100",
+	.bios = nvkm_bios_new,
 	.pci = gp100_pci_new,
 };
 

drivers/gpu/drm/nouveau/nvkm/subdev/bios/shadowramin.c

@@ -78,7 +78,10 @@ pramin_init(struct nvkm_bios *bios, const char *name)
 	 * important as we don't want to be touching vram on an
 	 * uninitialised board
 	 */
-	addr = nvkm_rd32(device, 0x619f04);
+	if (device->card_type >= GV100)
+		addr = nvkm_rd32(device, 0x625f04);
+	else
+		addr = nvkm_rd32(device, 0x619f04);
 	if (!(addr & 0x00000008)) {
 		nvkm_debug(subdev, "... not enabled\n");
 		return ERR_PTR(-ENODEV);