ASoC: msm: Check for read abort and return from copy function

When LAB Stop is issued from user space, it is required that
copy function in driver should return immediately. This is
required to avoid delay in starting concurrency cases such as
voice call or recording while LAB is in progress. This change
checks for abort read in copy function of platform driver and
return immediately.
Crs-fixed: 664648

Change-Id: Ia2540f3ce524267f6bc659b9c463945026ad657f
Signed-off-by: Venkat Sudhir <vsudhir@codeaurora.org>