msm: ipa3: Update the channel mode before start channel

Observing the race condition if channel mode configured after
channel start. To avoid these race conditions configuring the
channel mode and starting the channel.

Change-Id: I8f8ec2d9faed320539e2b18de90ab24059a5616c
Signed-off-by: Ashok Vuyyuru <avuyyuru@codeaurora.org>