power: Add snapshot of qpnp-smb2 charger and dependent modules

Add a snapshot of the qpnp-smb2 charger driver and supportive files.
This charger driver supports the PM660 charger module.

This snapshot is taken as of msm-4.4
commit d9fbe4b9210b ("Merge "ARM: dts: msm: Remove WLED short circuit
properties for PM660"")

CRs-Fixed: 2076000
Change-Id: I99d7f1e951afc93916dd77c9d44d3a5963d4ea51
Signed-off-by: Ankit Sharma <ansharma@codeaurora.org>