power: qpnp-smbcharger: Update get_prop_batt_status method

Since the hvdcp 3 detection sequence fakes disconnecting and
reconnecting the usb, this makes it look like the battery
charging status is glitching. So update the get_batt_prop_status
method to return CHARGING if the hvdcp_3_det_ignore_uv flag is
set.

CRs-Fixed: 899401
Change-Id: I675e5c14286fe376ef4ff747b2fc746e149513c4
Signed-off-by: Devesh Jhunjhunwala <deveshj@codeaurora.org>