drm/nouveau/mmu: Fix trailing semicolon

The trailing semicolon is an empty statement that does no operation.
Removing it since it doesn't do anything.
Signed-off-by: NLuis de Bethencourt <luisbg@kernel.org>
Reviewed-by: NKarol Herbst <kherbst@redhat.com>
Signed-off-by: NBen Skeggs <bskeggs@redhat.com>

drivers/gpu/drm/nouveau/nvkm/subdev/mmu/vmm.c

@@ -642,7 +642,7 @@ nvkm_vmm_ptes_sparse(struct nvkm_vmm *vmm, u64 addr, u64 size, bool ref)
 			else
 				block = (size >> page[i].shift) << page[i].shift;
 		} else {
-			block = (size >> page[i].shift) << page[i].shift;;
+			block = (size >> page[i].shift) << page[i].shift;
 		}
 
 		/* Perform operation. */