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There are use cases that 16kHz sample rate AUX PCM needed
besides 8kHz. Add the support so that the corresponding
sample rate dependent platform data is used to configure
the AUX PCM port.

Change-Id: I58715238cacdeea5e59b5e1693a34f005f289e0f
Signed-off-by: Kuirong Wang <kuirongw@codeaurora.org>