libnvdimm: fix smart data retrieval

It appears that smart data retrieval has been broken the since the
initial implementation.  Fix the payload size to be 128-bytes per the
specification.

Cc: <stable@vger.kernel.org>
Signed-off-by: NDan Williams <dan.j.williams@intel.com>

drivers/nvdimm/bus.c

@@ -407,7 +407,7 @@ static const struct nd_cmd_desc __nd_cmd_dimm_descs[] = {
 	[ND_CMD_IMPLEMENTED] = { },
 	[ND_CMD_SMART] = {
 		.out_num = 2,
-		.out_sizes = { 4, 8, },
+		.out_sizes = { 4, 128, },
 	},
 	[ND_CMD_SMART_THRESHOLD] = {
 		.out_num = 2,