hal: set combo device with default sample rate on bengal

In bengal, there is only one clock source, it cannot
support set different sample rate for HS and SPKR
combo device.

Fix it by setting 48Khz sample rate for HS and SPKR
combo device.

Change-Id: Ic327643a11b4418b9e152d9bc8f153bcea800a69
1 file changed