net: usb: Fix premature auto suspend on Rx control path

RMNET QMI driver does not prevent auto suspend while submitting
the URB on rx control path. This causes the usb device to go to
low power mode after receiving QMI notification as the auto suspend
timer does not get reset by the driver while submitting the URB
and it expires.

CRs-Fixed: 372251
Change-Id: Idb5c377c09d39ff53d4fac32599d6515ceb3da51
Signed-off-by: Hemant Kumar <hemantk@codeaurora.org>