f_gsi: Don't send end xfer command when USB is into U3 state

It is recommended to avoid sending end xfer command with USB GSI
endpoint when USB is into U3 state (i.e. bus suspended) as USB
controller may hang. USB GSI driver sends end xfer command with
suspend implementation when remote wakeup is not allowed. Hence
update IPA driver about remote wakeup status to suspend or
disconnect IPA GSI channel whereas remove sending end xfer command
to USB controller when remote wakeup is not allowed.

CRs-Fixed: 1077546
Change-Id: I3ac3714ccaf4ac9f16c26f59b9550aa825483344
Signed-off-by: Mayank Rana <mrana@codeaurora.org>