BACKPORT: CHROMEOS: hid-logitech-dj driver sometimes discards HID reports

Unifying receiver sometimes fails to send re-connection packets
when a wireless devices comes back in range or wakes-up. In that
case, bus enumerator driver should not drop incoming HID reports
from the device in question, and consider device as connected.

Signed-off-by: Julien Racle <jracle@logitech.com>

BUG=chromium:430897
TEST=Grab a Unifying receiver paired with an Illuminated Living-
Room Keyboard K830. Walk a few meters away from device till it
goes out of range (will trigger link loss). Go back close to the
device and try to use it. Nothing happens.

Reviewed-on: https://chromium-review.googlesource.com/228150
Reviewed-by: Andrew de los Reyes <adlr@chromium.org>
Tested-by: Julien Racle <jracle@logitech.com>
Commit-Queue: Julien Racle <jracle@logitech.com>

(cherry picked from commit e54a0edc7e6a26a360cdf93ec343eba9634a517a)

Change-Id: Ifaa968423a2d42748ec98807b4847a4366a523b5
Reviewed-on: https://chromium-review.googlesource.com/228470
Tested-by: Julien Racle <jracle@logitech.com>
Reviewed-by: Andrew de los Reyes <adlr@chromium.org>
Commit-Queue: Julien Racle <jracle@logitech.com>
(cherry picked from commit c9c68c16ce9814cf431e1ddb7d83e4b5874631ed)
Reviewed-on: https://chromium-review.googlesource.com/228842