mfd: tps80031: Add terminating entry for tps80031_id_table

The i2c_device_id table is supposed to be zero-terminated.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Acked-by: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
diff --git a/drivers/mfd/tps80031.c b/drivers/mfd/tps80031.c
index f64005e..10b51f7 100644
--- a/drivers/mfd/tps80031.c
+++ b/drivers/mfd/tps80031.c
@@ -543,6 +543,7 @@
 static const struct i2c_device_id tps80031_id_table[] = {
 	{ "tps80031", TPS80031 },
 	{ "tps80032", TPS80032 },
+	{ }
 };
 MODULE_DEVICE_TABLE(i2c, tps80031_id_table);