power: smb1360: Add snapshot of smb1360 charger

Initial snapshot of smb1360 driver is taken from msm-3.18
kernel version @ commit f8b6819d0432d6 ("msm: ipa: Fix to
handle NULL pointer dereference")

Add PMIC charger and fuel gauge drivers to msm-4.9. The power
directory structure has changed in kernel version 4.9. Align
smb1360 driver from msm-3.18 kernel with new directory structure.

Since USB driver uses the extcon framework for communication,
extcon support and USB power supply support is added.

Change-Id: Iaef0ef4ac9a48b09dde8bd9067ed0495f20e00d8
Signed-off-by: Arulpandiyan Vadivel <avadiv@codeaurora.org>
Signed-off-by: Sundara Vinayagam <sundvi@codeaurora.org>