regulator: tps51632: Get regulator name from i2c_client

Commit "i2c: core: make it possible to match a pure device tree driver"
changed semantics of the i2c probing for device tree devices.
Device tree probed devices now get a NULL i2c_device_id pointer.
This causes the regulator name to be set to NULL and the regulator
registration to fail.

Signed-off-by: Mikko Perttunen <mperttunen@nvidia.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
diff --git a/drivers/regulator/tps51632-regulator.c b/drivers/regulator/tps51632-regulator.c
index b0a3f09..3486be9 100644
--- a/drivers/regulator/tps51632-regulator.c
+++ b/drivers/regulator/tps51632-regulator.c
@@ -305,7 +305,7 @@
 	}
 
 	tps->dev = &client->dev;
-	tps->desc.name = id->name;
+	tps->desc.name = client->name;
 	tps->desc.id = 0;
 	tps->desc.ramp_delay = TPS51632_DEFAULT_RAMP_DELAY;
 	tps->desc.min_uV = TPS51632_MIN_VOLATGE;