power: qpnp-linear-charger: Update initial USB status

When kernel boots without USB connected, the USB driver
expects BSV(peripheral session valid) clear event from
the charger driver for the proper initialization of it's
state machine.

Update the USB psy with the initial USB status.

CRs-Fixed: 637966
Change-Id: If8172289585a8a3c073c037d81834a13a40ec3bb
Signed-off-by: Ashay Jaiswal <ashayj@codeaurora.org>