FROMGIT: usb: typec: tcpci: Implement Auto discharge disconnect callbacks

vImplement callbacks for enabling/disabling
POWER_CONTROL.AutoDischargeDisconnect.

Programs VBUS_SINK_DISCONNECT_THRESHOLD based on the
voltage requested as sink, mode of operation.

The programmed threshold is based on vSinkDisconnect and
vSinkDisconnectPD values.

Add auto_discharge_disconnect to tdata to allow TCPC chip
level drivers enable AutoDischargeDisconnect.

Bug: 168555244
Signed-off-by: Badhri Jagan Sridharan <badhri@google.com>
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Link: https://lore.kernel.org/r/20201029063138.1429760-9-badhri@google.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
(cherry picked from commit e1a97bf8
 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git

 usb-next)
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
(cherry picked from commit 33936ca3f6348db3e2e79776b01bc8339c446c80)
(cherry picked from commit 3622a289e91fe57a4a6b8ca210119c1b645444ea)
Signed-off-by: Will McVicker <willmcvicker@google.com>
(cherry picked from commit 8285bc18)
Signed-off-by: Will McVicker <willmcvicker@google.com>
Change-Id: I896d47412ec6eaa23b87c38be545618f811253c8