msm: ecm_ipa: set default state of queue to stop

This change is done in order to avoid packet
from being transmitted during connect sequence in
which the driver is not yet in ready state.
It was seen that the network stack tries to send
packets even when no explicit start-queue was called.

Change-Id: Iaf0ff26339def9c077eccb8f5a374117764e8e67
Signed-off-by: Talel Shenhar <tatias@codeaurora.org>