tcpci_max77759: Clear auto discharge before enabling toggling

Ideally auto discharge should have been cleared while transitioning
into the unattached state. Check and clear autodischarge if this is
not the case as a recovery path.

Bug: 195706673
Change-Id: I4ba2ea320d760534d6a2df1bac375cee191c8f7d
Signed-off-by: Badhri Jagan Sridharan <badhri@google.com>