power: qpnp-qg: Clear the STATUS2 register during init

There could a GOOD_OCV when the device is off. Clear the
GOOD_OCV status register by reading from it during init
and during device suspend.

Change-Id: If88ea132c4151712e8402b64b3b88bd3daf2fd1a
Signed-off-by: Anirudh Ghayal <aghayal@codeaurora.org>