power: qpnp-charger: distinguish charger subtypes

There are three different types of charger peripheral
the qpnp-charger driver supports: SMBB, SMBBP, SMBCL

Add a new parameter which helps control workarounds
by distinguishing between charger types.

CRs-Fixed: 470841
Change-Id: If6218e1076818d635ccd8c27ae97216eab23c3d0
Signed-off-by: David Keitel <dkeitel@codeaurora.org>