power: qpnp-fg-gen4: Fix POWER_SUPPLY_PROP_BATT_AGE_LEVEL reporting

Add a break statement to fix the POWER_SUPPLY_PROP_BATT_AGE_LEVEL property
without which it will fall through to POWER_SUPPLY_PROP_SCALE_MODE_EN
property and a wrong value will be updated as battery age level.

Change-Id: I6b58f92a183a97d7a641e3a1eeb12e26ac185b61
Signed-off-by: Sahil Chandna <chandna@codeaurora.org>