sdm: Disable posted start only in mode transition

Posted start is only disabled during mode transition
when frame switch. Then the subsequent frames without
mode switch should have posted start enabled. Change
sets the frame trigger mode to default only during
mode transition by checking the features in the mode.
In all the other conditions frame trigger mode is set
to posted start.

Change-Id: I728d45fb8cee5e5f40c4c485c0925c14c4d7feef
2 files changed