regulator: act8865: Fix build error without CONFIG_POWER_SUPPLY

Building without CONFIG_POWER_SUPPLY will fail:

drivers/regulator/act8865-regulator.o: In function `act8865_pmic_probe':
act8865-regulator.c:(.text+0x357): undefined reference to `devm_power_supply_register'
drivers/regulator/act8865-regulator.o: In function `act8600_charger_get_property':
act8865-regulator.c:(.text+0x3f1): undefined reference to `power_supply_get_drvdata'

Add POWER_SUPPLY dependency to Kconfig.
Reported-by: Hulk Robot <hulkci@huawei.com>
Fixes: 2d09a79b ("regulator: act8865: Add support for act8600 charger")
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Link: https://lore.kernel.org/r/20190807133822.67124-1-yuehaibing@huawei.comSigned-off-by: Mark Brown <broonie@kernel.org>

drivers/regulator/Kconfig

@@ -83,6 +83,7 @@ config REGULATOR_88PM8607
 config REGULATOR_ACT8865
 	tristate "Active-semi act8865 voltage regulator"
 	depends on I2C
+	depends on POWER_SUPPLY
 	select REGMAP_I2C
 	help
 	  This driver controls a active-semi act8865 voltage output