mfd: Register tps65910 gpios as an mfd device

As gpio support for tps65910 is on gpio driver, registering
gpio support as the mfd sub devices instead of calling gpio_init()
from the core probe.
Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

drivers/mfd/Kconfig

@@ -189,7 +189,6 @@ config MFD_TPS65910
 	bool "TPS65910 Power Management chip"
 	depends on I2C=y && GPIOLIB
 	select MFD_CORE
-	select GPIO_TPS65910
 	select REGMAP_I2C
 	help
 	  if you say yes here you get support for the TPS65910 series of

drivers/mfd/tps65910.c

@@ -19,13 +19,15 @@
 #include <linux/err.h>
 #include <linux/slab.h>
 #include <linux/i2c.h>
-#include <linux/gpio.h>
 #include <linux/mfd/core.h>
 #include <linux/regmap.h>
 #include <linux/mfd/tps65910.h>
 #include <linux/of_device.h>
 
 static struct mfd_cell tps65910s[] = {
+	{
+		.name = "tps65910-gpio",
+	},
 	{
 		.name = "tps65910-pmic",
 	},
@@ -250,8 +252,6 @@ static __devinit int tps65910_i2c_probe(struct i2c_client *i2c,
 	init_data->irq = pmic_plat_data->irq;
 	init_data->irq_base = pmic_plat_data->irq_base;
 
-	tps65910_gpio_init(tps65910, pmic_plat_data->gpio_base);
-
 	tps65910_irq_init(tps65910, init_data->irq, init_data);
 
 	tps65910_sleepinit(tps65910, pmic_plat_data);

include/linux/mfd/tps65910.h

@@ -830,9 +830,6 @@ struct tps65910 {
 	struct tps65910_rtc *rtc;
 	struct tps65910_power *power;
 
-	/* GPIO Handling */
-	struct gpio_chip gpio;
-
 	/* IRQ Handling */
 	struct mutex irq_lock;
 	int chip_irq;
@@ -846,7 +843,6 @@ struct tps65910_platform_data {
 	int irq_base;
 };
 
-void tps65910_gpio_init(struct tps65910 *tps65910, int gpio_base);
 int tps65910_irq_init(struct tps65910 *tps65910, int irq,
 		struct tps65910_platform_data *pdata);
 int tps65910_irq_exit(struct tps65910 *tps65910);