regulator: Fix desc_id for tps65023/6507x/65910

The desc_id variable should not be a static variable.

The rest of the code assumes the desc_id must less than TPSxxxxx_NUM_REGULATOR.
If we set desc_id to be a static variable, checking the return value of
rdev_get_id() may return error.

Signed-off-by: Axel Lin <axel.lin@gmail.com>
Cc: Anuj Aggarwal <anuj.aggarwal@ti.com>
Cc: Graeme Gregory <gg@slimlogic.co.uk>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
diff --git a/drivers/regulator/tps65023-regulator.c b/drivers/regulator/tps65023-regulator.c
index 60a7ca5..fbddc15 100644
--- a/drivers/regulator/tps65023-regulator.c
+++ b/drivers/regulator/tps65023-regulator.c
@@ -466,7 +466,6 @@
 static int __devinit tps_65023_probe(struct i2c_client *client,
 				     const struct i2c_device_id *id)
 {
-	static int desc_id;
 	const struct tps_info *info = (void *)id->driver_data;
 	struct regulator_init_data *init_data;
 	struct regulator_dev *rdev;
@@ -499,7 +498,7 @@
 		tps->info[i] = info;
 
 		tps->desc[i].name = info->name;
-		tps->desc[i].id = desc_id++;
+		tps->desc[i].id = i;
 		tps->desc[i].n_voltages = num_voltages[i];
 		tps->desc[i].ops = (i > TPS65023_DCDC_3 ?
 					&tps65023_ldo_ops : &tps65023_dcdc_ops);