drm/nouveau: quiet static-related sparse noise

Signed-off-by: Marcin Slusarz <marcin.slusarz@gmail.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
diff --git a/drivers/gpu/drm/nouveau/core/subdev/bios/therm.c b/drivers/gpu/drm/nouveau/core/subdev/bios/therm.c
index b7916a5..22a2057 100644
--- a/drivers/gpu/drm/nouveau/core/subdev/bios/therm.c
+++ b/drivers/gpu/drm/nouveau/core/subdev/bios/therm.c
@@ -55,7 +55,7 @@
 	return therm + nv_ro08(bios, therm + 1);
 }
 
-u16
+static u16
 nvbios_therm_entry(struct nouveau_bios *bios, int idx, u8 *ver, u8 *len)
 {
 	u8 hdr, cnt;