drivers: usb: mbim: mark cable disconnected when no remote wakeup

In a scenario where the MBIM host doesn't permit remote wakeup,
it is still possible for the device to try and queue packets
(ie: hibernate, sleep). This resulted in a bad LPM sequence and an error
message: "Cannot transition the HS PHY to L2". This patch marks device
offline when pipes are disconnected and remote
wakeup is not enabled.

Change-Id: I43ce0dd94d523bb5155cac26b00bdb10173d6eca
CRs-fixed: 717592
Signed-off-by: Lena Salman <esalman@codeaurora.org>