msm: ipa: Fix not sending any packets in suspend mode

When rmnet_ipa driver is suspending, there can be a race
where the netdev queue is active and packets are sent out.
Make a change to avoid sending packets when device is
suspending.

Change-Id: Iab6b4ce0857504468ca45f06c570e5a4c60ffc61
Signed-off-by: Praveen Kurapati <pkurapat@codeaurora.org>
Signed-off-by: Chaitanya Pratapa <cpratapa@codeaurora.org>