drm/nvf0-/gr: ctxsw scratch reg count got bumped to 16

drivers/gpu/drm/nouveau/core/engine/graph/fuc/com.fuc

drivers/gpu/drm/nouveau/core/engine/graph/fuc/gpc.fuc

drivers/gpu/drm/nouveau/core/engine/graph/fuc/gpcnvc0.fuc.h

drivers/gpu/drm/nouveau/core/engine/graph/fuc/gpcnvd7.fuc.h

drivers/gpu/drm/nouveau/core/engine/graph/fuc/gpcnve0.fuc.h

drivers/gpu/drm/nouveau/core/engine/graph/fuc/gpcnvf0.fuc.h

drivers/gpu/drm/nouveau/core/engine/graph/fuc/hub.fuc

drivers/gpu/drm/nouveau/core/engine/graph/fuc/hubnvc0.fuc.h

drivers/gpu/drm/nouveau/core/engine/graph/fuc/hubnvd7.fuc.h

drivers/gpu/drm/nouveau/core/engine/graph/fuc/hubnve0.fuc.h

drivers/gpu/drm/nouveau/core/engine/graph/fuc/hubnvf0.fuc.h

drivers/gpu/drm/nouveau/core/engine/graph/fuc/macros.fuc