drm/nouveau: Fix spelling mistake "endianess" -> "endianness"

There is a spelling mistake in a nvdev_error error message. Fix it.
Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
Reviewed-by: Lyude Paul <lyude@redhat.com>
Signed-off-by: Lyude Paul <lyude@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220315221929.2959700-1-colin.i.king@gmail.com

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

@@ -2935,7 +2935,7 @@ nvkm_device_ctor(const struct nvkm_device_func *func,
 		/* switch mmio to cpu's native endianness */
 		if (!nvkm_device_endianness(device)) {
 			nvdev_error(device,
-				    "Couldn't switch GPU to CPUs endianess\n");
+				    "Couldn't switch GPU to CPUs endianness\n");
 			ret = -ENOSYS;
 			goto done;
 		}