mfd: tps65910: Remove unused data

The 'io_mutex' is not used anywhere.
The regmap API supports the mutex internally, so no additional mutex
is required.

And 'domain' private data is unnecessary because the irq domain is
already registered by using regmap_add_irq_chip().

Signed-off-by: Milo(Woogyom) Kim <milo.kim@ti.com>
Acked-by: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

drivers/mfd/tps65910.c

@@ -486,7 +486,6 @@ static __devinit int tps65910_i2c_probe(struct i2c_client *i2c,
 	tps65910->dev = &i2c->dev;
 	tps65910->i2c_client = i2c;
 	tps65910->id = chip_id;
-	mutex_init(&tps65910->io_mutex);
 
 	tps65910->regmap = devm_regmap_init_i2c(i2c, &tps65910_regmap_config);
 	if (IS_ERR(tps65910->regmap)) {

include/linux/mfd/tps65910.h

@@ -893,7 +893,6 @@ struct tps65910 {
 	struct device *dev;
 	struct i2c_client *i2c_client;
 	struct regmap *regmap;
-	struct mutex io_mutex;
 	unsigned int id;
 
 	/* Client devices */
@@ -907,7 +906,6 @@ struct tps65910 {
 	/* IRQ Handling */
 	int chip_irq;
 	struct regmap_irq_chip_data *irq_data;
-	struct irq_domain *domain;
 };
 
 struct tps65910_platform_data {