drm/nouveau/gsp: change gv100_gsp from global to static

Smatch reports this issue
gv100.c:46:1: warning: symbol 'gv100_gsp' was not declared. Should it be static?

gv100_gsp is only used in gv100.c so change its
storage-class specifier to static.
Signed-off-by: Tom Rix <trix@redhat.com>
Reviewed-by: Lyude Paul <lyude@redhat.com>
Signed-off-by: Lyude Paul <lyude@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220421133028.724954-1-trix@redhat.com

drivers/gpu/drm/nouveau/nvkm/subdev/gsp/gv100.c

@@ -42,7 +42,7 @@ gv100_gsp_nofw(struct nvkm_gsp *gsp, int ver, const struct nvkm_gsp_fwif *fwif)
 	return 0;
 }
 
-struct nvkm_gsp_fwif
+static struct nvkm_gsp_fwif
 gv100_gsp[] = {
 	{ -1, gv100_gsp_nofw, &gv100_gsp_flcn },
 	{}