power: supply: core: Use true and false for bool variable

Fix the following coccicheck warning:

./include/linux/power_supply.h:507:9-10: WARNING: return of 0/1 in
function 'power_supply_is_watt_property' with return type bool.

./include/linux/power_supply.h:479:9-10: WARNING: return of 0/1 in
function 'power_supply_is_amp_property' with return type bool.

Reported-by: Abaci Robot<abaci@linux.alibaba.com>
Signed-off-by: Jiapeng Chong <jiapeng.chong@linux.alibaba.com>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>

include/linux/power_supply.h

@@ -482,12 +482,12 @@ static inline bool power_supply_is_amp_property(enum power_supply_property psp)
 	case POWER_SUPPLY_PROP_CURRENT_NOW:
 	case POWER_SUPPLY_PROP_CURRENT_AVG:
 	case POWER_SUPPLY_PROP_CURRENT_BOOT:
-		return 1;
+		return true;
 	default:
 		break;
 	}
 
-	return 0;
+	return false;
 }
 
 static inline bool power_supply_is_watt_property(enum power_supply_property psp)
@@ -510,12 +510,12 @@ static inline bool power_supply_is_watt_property(enum power_supply_property psp)
 	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
 	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
 	case POWER_SUPPLY_PROP_POWER_NOW:
-		return 1;
+		return true;
 	default:
 		break;
 	}
 
-	return 0;
+	return false;
 }
 
 #ifdef CONFIG_POWER_SUPPLY_HWMON