FROMGIT: driver core: Call sync_state() even if supplier has no consumers

The initial patch that added sync_state() support didn't handle the case
where a supplier has no consumers. This was because when a device is
successfully bound with a driver, only its suppliers were checked to see
if they are eligible to get a sync_state(). This is not sufficient for
devices that have no consumers but still need to do device state clean
up. So fix this.

Fixes: fc5a251d0fd7ca90 (driver core: Add sync_state driver/bus callback)
Signed-off-by: Saravana Kannan <saravanak@google.com>
Cc: stable <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20200221080510.197337-2-saravanak@google.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
(cherry picked from commit 21eb93f432b1a785df193df1a56a59e9eb3a985f
https: //git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core.git driver-core-linus)
Bug: 150980623
Change-Id: I9bebc164f00d7797501f40080c12a04dbe3095b1