power: supply: qti_battery_charger: run usb_type_work during probe

Currently, updating USB type only depends on USB status change
notification from the charger firmware. During a reboot with USB
connected, there is a chance that a USB power supply notification would
have been sent by the charger firmware little earlier even before the
battery charger driver was ready to handle it. Hence it would've got
missed and USB type is not updated properly. Fix it by scheduling
usb_type_work once the driver probes.

Change-Id: I0ae482e90a76a0b2128fcc45561adb77a2ca017c
Signed-off-by: Fenglin Wu <fenglinw@codeaurora.org>