audio HAL: fix start_call() error handling.

In case of an error when opening the modem pcm driver in start_call(),
the order in which the tinyalsa pcm streams were relased was wrong and
could cause calling pcm_close() on a null pcm stream.

Change-Id: Iad7149997d3993561f4a3ed4b2005f5867b51c56
1 file changed