Fixes the following W=1 kernel build warning(s):

 drivers/gpu/drm/nouveau/nvkm/nvfw/acr.c:49:1: warning: no previous prototype for ‘wpr_generic_header_dump’ [-Wmissing-prototypes]

Cc: Ben Skeggs <bskeggs@redhat.com>
Cc: Karol Herbst <kherbst@redhat.com>
Cc: Lyude Paul <lyude@redhat.com>
Cc: David Airlie <airlied@gmail.com>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: Gourav Samaiya <gsamaiya@nvidia.com>
Cc: dri-devel@lists.freedesktop.org
Cc: nouveau@lists.freedesktop.org
Signed-off-by: Lee Jones <lee@kernel.org>
---
 drivers/gpu/drm/nouveau/nvkm/nvfw/acr.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/nouveau/nvkm/nvfw/acr.c b/drivers/gpu/drm/nouveau/nvkm/nvfw/acr.c
index 83a9c48bc58cb..7ac90c495737a 100644
--- a/drivers/gpu/drm/nouveau/nvkm/nvfw/acr.c
+++ b/drivers/gpu/drm/nouveau/nvkm/nvfw/acr.c
@@ -45,7 +45,7 @@ wpr_header_v1_dump(struct nvkm_subdev *subdev, const struct wpr_header_v1 *hdr)
 	nvkm_debug(subdev, "\tstatus        : %d\n", hdr->status);
 }
 
-void
+static void
 wpr_generic_header_dump(struct nvkm_subdev *subdev, const struct wpr_generic_header *hdr)
 {
 	nvkm_debug(subdev, "wprGenericHeader\n");
-- 
2.40.0.rc1.284.g88254d51c5-goog