msm: ipa3: Fix to race condition in updating current polling state

Configure the callback mode only one time after starting the channel
otherwise observing IEOB interrupt received before configure callback
mode second time. It was leading race condition in updating current
polling state.

Change-Id: I35cdf77ee564ca82d9ff3e0cc6a58a88e8cbb471
Signed-off-by: Ashok Vuyyuru <avuyyuru@codeaurora.org>