Modified submix buffer size accessors to use the pipe configuration.

This change stores the period size (fraction of the pipe buffer size)
in the submix device's configuration which is then used to calculate
the input and output stream buffer size.

In addition, accessors for the input / output stream format have been
modified to use the pipe format in the device configuration rather than
returning hard coded values.

Bug: 11273000
Change-Id: I9c14f8d549f4b4a6d7f77a9aeab4edfa5ba6bd1a
1 file changed