power_supply: Add support for CHARGE_CONTROL_* attributes

Add support for power supply attributes CHARGE_CONTROL_LIMIT
and CHARGE_CONTROL_LIMIT_MAX.

These new attributes will enable the user space to implement
custom charging algorithms based on platform state.

Signed-off-by: Ramakrishna Pallala <ramakrishna.pallala@intel.com>
Signed-off-by: Anton Vorontsov <anton.vorontsov@linaro.org>
diff --git a/drivers/power/power_supply_sysfs.c b/drivers/power/power_supply_sysfs.c
index 395c2cf..40fa3b7 100644
--- a/drivers/power/power_supply_sysfs.c
+++ b/drivers/power/power_supply_sysfs.c
@@ -164,6 +164,8 @@
 	POWER_SUPPLY_ATTR(constant_charge_current_max),
 	POWER_SUPPLY_ATTR(constant_charge_voltage),
 	POWER_SUPPLY_ATTR(constant_charge_voltage_max),
+	POWER_SUPPLY_ATTR(charge_control_limit),
+	POWER_SUPPLY_ATTR(charge_control_limit_max),
 	POWER_SUPPLY_ATTR(energy_full_design),
 	POWER_SUPPLY_ATTR(energy_empty_design),
 	POWER_SUPPLY_ATTR(energy_full),