qpnp-smb2: fix FV and FCC reporting

Currently the read of battery's voltage_max property (FV) and battery's
current_max property (FCC) returns the value of DEFAULT_VOTER voter.

But such a voter doesn't exist on battery's voltage_max property. Fix it
by returning the value voted by BATT_PROFILE_VOTER.

Change-Id: I2dac98f2ce9a423d5045788dbe120591f10c5a9e
Signed-off-by: Abhijeet Dharmapurikar <adharmap@codeaurora.org>