mfd: Add battery charger in tps65090 sub devs

TPS65090 supports the battery charging and hence adding
the device name in the list of TPS65090 children. Also
remove the tps65090-regulator as it duplicates with
tps65090-pmic for regulator driver.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
diff --git a/drivers/mfd/tps65090.c b/drivers/mfd/tps65090.c
index 074ae32..9b79d68 100644
--- a/drivers/mfd/tps65090.c
+++ b/drivers/mfd/tps65090.c
@@ -74,7 +74,7 @@
 		.name = "tps65090-pmic",
 	},
 	{
-		.name = "tps65090-regulator",
+		.name = "tps65090-charger",
 	},
 };