drivers: power: supply: goldfish_battery: Add support for reading more properties

To comply with tests we need to support more power supply properties:

POWER_SUPPLY_PROP_VOLTAGE_NOW
POWER_SUPPLY_PROP_TEMP
POWER_SUPPLY_PROP_CHARGE_COUNTER
POWER_SUPPLY_PROP_CURRENT_NOW
POWER_SUPPLY_PROP_CURRENT_AVG
POWER_SUPPLY_PROP_CHARGE_FULL
POWER_SUPPLY_PROP_CYCLE_COUNT
POWER_SUPPLY_PROP_VOLTAGE_MAX
POWER_SUPPLY_PROP_CURRENT_MAX

Signed-off-by: Roman Kiryanov <rkir@google.com>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>