lms: fix LMS_StartStream() handling for multiple channels

LMS_StartStream() (in LMSDevice::start()) was moved to separate loop. It
is because LMS_SetupStream() would fail for second channel if streaming
has already been started (LMS_StartStream()) for single channel
configuration.

Change-Id: I6704bb92864aa81417507c4ae24a22f41dc529c1
1 file changed