power: qpnp-qg: Add battery hot-swap support in QG

Support battery hot-swap (removal and re-insertion with
USB present). Clear the userspace and SDAM data during
hot-swap.

Change-Id: Iaabf3de46ed72e33980d1e3e386e8ca0ae651c77
Signed-off-by: Anirudh Ghayal <aghayal@codeaurora.org>