mfd: Add terminating entry for i2c_device_id palmas table

The i2c_device_id table is supposed to be zero-terminated.

Signed-off-by: Axel Lin <axel.lin@gmail.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
diff --git a/drivers/mfd/palmas.c b/drivers/mfd/palmas.c
index 00c0aba..5d896b3 100644
--- a/drivers/mfd/palmas.c
+++ b/drivers/mfd/palmas.c
@@ -472,6 +472,7 @@
 	{ "twl6035", },
 	{ "twl6037", },
 	{ "tps65913", },
+	{ /* end */ }
 };
 MODULE_DEVICE_TABLE(i2c, palmas_i2c_id);